diff --git a/src/Gopkg.lock b/src/Gopkg.lock
index 2b1138151..dc01670c3 100644
--- a/src/Gopkg.lock
+++ b/src/Gopkg.lock
@@ -58,6 +58,12 @@
   packages = ["."]
   revision = "e87155e8f0c05bf323d0b13470e1b97af0cb5652"
 
+[[projects]]
+  name = "github.com/blang/semver"
+  packages = ["."]
+  revision = "2ee87856327ba09384cabd113bc6b5d174e9ec0f"
+  version = "v3.5.1"
+
 [[projects]]
   name = "github.com/davecgh/go-spew"
   packages = ["spew"]
@@ -371,6 +377,6 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "db970de67fb6d82511e2fb991860473786678b3c1dfc4fb835046fafbaa61f57"
+  inputs-digest = "0392e2659013ae00be46cd4f0b9d56aa0765b6297d672a56175249c465e98a8d"
   solver-name = "gps-cdcl"
   solver-version = 1
diff --git a/src/Gopkg.toml b/src/Gopkg.toml
index eacbc4ea8..0adeaba58 100644
--- a/src/Gopkg.toml
+++ b/src/Gopkg.toml
@@ -90,4 +90,8 @@ ignored = ["github.com/vmware/harbor/tests*"]
 
 [[constraint]]
   name = "github.com/ghodss/yaml"
-  version = "=1.0.0"
\ No newline at end of file
+  version = "=1.0.0"
+
+[[constraint]]
+  name = "github.com/blang/semver"
+  version = "=3.5.1"
\ No newline at end of file
diff --git a/src/chartserver/chart_operator.go b/src/chartserver/chart_operator.go
index c1d5bac9a..f5007fc0d 100644
--- a/src/chartserver/chart_operator.go
+++ b/src/chartserver/chart_operator.go
@@ -1,12 +1,182 @@
 package chartserver
 
-import "k8s.io/helm/pkg/proto/hapi/chart"
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/Masterminds/semver"
+
+	"k8s.io/helm/pkg/chartutil"
+	helm_repo "k8s.io/helm/pkg/repo"
+)
+
+const (
+	readmeFileName = "README.md"
+)
+
+//ChartVersionDetails keeps the detailed data info of the chart version
+type ChartVersionDetails struct {
+	Metadata     *helm_repo.ChartVersion `json:"metadata"`
+	Dependencies []*chartutil.Dependency `json:"dependencies"`
+	Values       map[string]interface{}  `json:"values"`
+	Files        map[string]string       `json:"files"`
+}
+
+//ChartInfo keeps the information of the chart
+type ChartInfo struct {
+	Name          string
+	TotalVersions uint32 `json:"total_versions"`
+	Created       time.Time
+	Icon          string
+	Home          string
+}
 
 //ChartOperator is designed to process the contents of
 //the specified chart version to get more details
 type ChartOperator struct{}
 
 //GetChartDetails parse the details from the provided content bytes
-func (cho *ChartOperator) GetChartDetails(content []byte) *chart.Chart {
-	return nil
+func (cho *ChartOperator) GetChartDetails(content []byte) (*ChartVersionDetails, error) {
+	if content == nil || len(content) == 0 {
+		return nil, errors.New("zero content")
+	}
+
+	//Load chart from in-memory content
+	reader := bytes.NewReader(content)
+	chartData, err := chartutil.LoadArchive(reader)
+	if err != nil {
+		return nil, err
+	}
+
+	//Parse the requirements of chart
+	requirements, err := chartutil.LoadRequirements(chartData)
+	if err != nil {
+		return nil, err
+	}
+
+	var values map[string]interface{}
+	files := make(map[string]string)
+	//Parse values
+	if chartData.Values != nil {
+		values = parseRawValues([]byte(chartData.Values.GetRaw()))
+		//Append values.yaml file
+		files["values.yaml"] = chartData.Values.Raw
+	}
+
+	//Append other files like 'README.md'
+	for _, v := range chartData.GetFiles() {
+		if v.TypeUrl == readmeFileName {
+			files[readmeFileName] = string(v.GetValue())
+			break
+		}
+	}
+
+	theChart := &ChartVersionDetails{
+		Dependencies: requirements.Dependencies,
+		Values:       values,
+		Files:        files,
+	}
+
+	return theChart, nil
+}
+
+//GetChartList returns a reorganized chart list
+func (cho *ChartOperator) GetChartList(content []byte) ([]*ChartInfo, error) {
+	if content == nil || len(content) == 0 {
+		return nil, errors.New("zero content")
+	}
+
+	allCharts := make(map[string]helm_repo.ChartVersions)
+	if err := json.Unmarshal(content, &allCharts); err != nil {
+		return nil, err
+	}
+
+	chartList := make([]*ChartInfo, 0)
+	for key, chartVersions := range allCharts {
+		lVersion, oVersion := getTheTwoCharts(chartVersions)
+		if lVersion != nil && oVersion != nil {
+			chartInfo := &ChartInfo{
+				Name:          key,
+				TotalVersions: uint32(len(chartVersions)),
+			}
+			chartInfo.Created = oVersion.Created
+			chartInfo.Home = lVersion.Home
+			chartInfo.Icon = lVersion.Icon
+			chartList = append(chartList, chartInfo)
+		}
+	}
+
+	return chartList, nil
+}
+
+//Get the latest and oldest chart versions
+func getTheTwoCharts(chartVersions helm_repo.ChartVersions) (latestChart *helm_repo.ChartVersion, oldestChart *helm_repo.ChartVersion) {
+	if len(chartVersions) == 1 {
+		return chartVersions[0], chartVersions[0]
+	}
+
+	for _, chartVersion := range chartVersions {
+		currentV, err := semver.NewVersion(chartVersion.Version)
+		if err != nil {
+			//ignore it
+			continue
+		}
+
+		//Find latest chart
+		if latestChart == nil {
+			latestChart = chartVersion
+		} else {
+			lVersion, _ := semver.NewVersion(latestChart.Version)
+			if lVersion.LessThan(currentV) {
+				latestChart = chartVersion
+			}
+		}
+
+		if oldestChart == nil {
+			oldestChart = chartVersion
+		} else {
+			if oldestChart.Created.After(chartVersion.Created) {
+				oldestChart = chartVersion
+			}
+		}
+	}
+
+	return latestChart, oldestChart
+}
+
+//Parse the raw values to value map
+func parseRawValues(rawValue []byte) map[string]interface{} {
+	valueMap := make(map[string]interface{})
+
+	if len(rawValue) == 0 {
+		return valueMap
+	}
+
+	values, err := chartutil.ReadValues(rawValue)
+	if err != nil || len(values) == 0 {
+		return valueMap
+	}
+
+	readValue(values, "", valueMap)
+
+	return valueMap
+}
+
+//Recursively read value
+func readValue(values map[string]interface{}, keyPrefix string, valueMap map[string]interface{}) {
+	for key, value := range values {
+		longKey := key
+		if keyPrefix != "" {
+			longKey = fmt.Sprintf("%s.%s", keyPrefix, key)
+		}
+
+		if subValues, ok := value.(map[string]interface{}); ok {
+			readValue(subValues, longKey, valueMap)
+		} else {
+			valueMap[longKey] = value
+		}
+	}
 }
diff --git a/src/chartserver/client.go b/src/chartserver/client.go
new file mode 100644
index 000000000..92e620273
--- /dev/null
+++ b/src/chartserver/client.go
@@ -0,0 +1,67 @@
+package chartserver
+
+import (
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"strings"
+	"time"
+)
+
+const (
+	clientTimeout         = 10 * time.Second
+	maxIdleConnections    = 10
+	idleConnectionTimeout = 30 * time.Second
+)
+
+//ChartClient is a http client to get the content from the external http server
+type ChartClient struct {
+	httpClient *http.Client
+}
+
+//NewChartClient is constructor of ChartClient
+func NewChartClient() *ChartClient { //Create http client with customized timeouts
+	client := &http.Client{
+		Timeout: clientTimeout,
+		Transport: &http.Transport{
+			MaxIdleConns:    maxIdleConnections,
+			IdleConnTimeout: idleConnectionTimeout,
+		},
+	}
+
+	return &ChartClient{client}
+}
+
+//GetContent get the bytes from the specified url
+func (cc *ChartClient) GetContent(url string) ([]byte, error) {
+	if len(strings.TrimSpace(url)) == 0 {
+		return nil, errors.New("empty url is not allowed")
+	}
+
+	request, err := http.NewRequest(http.MethodGet, url, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	//Set basic auth
+	request.SetBasicAuth(userName, os.Getenv(passwordKey))
+
+	response, err := cc.httpClient.Do(request)
+	if err != nil {
+		return nil, err
+	}
+
+	if response.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("failed to retrieve content from url %s", url)
+	}
+
+	content, err := ioutil.ReadAll(response.Body)
+	if err != nil {
+		return nil, err
+	}
+	defer response.Body.Close()
+
+	return content, nil
+}
diff --git a/src/chartserver/controller.go b/src/chartserver/controller.go
index 709365f72..0bf8b0fa5 100644
--- a/src/chartserver/controller.go
+++ b/src/chartserver/controller.go
@@ -2,15 +2,7 @@ package chartserver
 
 import (
 	"errors"
-	"net/http"
 	"net/url"
-	"time"
-)
-
-const (
-	clientTimeout         = 10 * time.Second
-	maxIdleConnections    = 10
-	idleConnectionTimeout = 30 * time.Second
 )
 
 //Controller is used to handle flows of related requests based on the corresponding handlers
@@ -40,13 +32,7 @@ func NewController(backendServer *url.URL) (*Controller, error) {
 	proxy := NewProxyEngine(backendServer)
 
 	//Create http client with customized timeouts
-	client := &http.Client{
-		Timeout: clientTimeout,
-		Transport: &http.Transport{
-			MaxIdleConns:    maxIdleConnections,
-			IdleConnTimeout: idleConnectionTimeout,
-		},
-	}
+	client := NewChartClient()
 
 	//Initialize chart operator for use
 	operator := &ChartOperator{}
@@ -60,8 +46,10 @@ func NewController(backendServer *url.URL) (*Controller, error) {
 			backendServerAddress: backendServer,
 		},
 		manipulationHandler: &ManipulationHandler{
-			trafficProxy:  proxy,
-			chartOperator: operator,
+			trafficProxy:         proxy,
+			chartOperator:        operator,
+			apiClient:            client,
+			backendServerAddress: backendServer,
 		},
 	}, nil
 }
diff --git a/src/chartserver/manipulation_handler.go b/src/chartserver/manipulation_handler.go
index 37b212d71..eae4ee7e9 100644
--- a/src/chartserver/manipulation_handler.go
+++ b/src/chartserver/manipulation_handler.go
@@ -1,7 +1,14 @@
 package chartserver
 
 import (
+	"encoding/json"
+	"fmt"
 	"net/http"
+	"net/url"
+	"strings"
+
+	"github.com/ghodss/yaml"
+	helm_repo "k8s.io/helm/pkg/repo"
 )
 
 //ManipulationHandler includes all the handler methods for the purpose of manipulating the
@@ -13,11 +20,38 @@ type ManipulationHandler struct {
 
 	//Parse and process the chart version to provide required info data
 	chartOperator *ChartOperator
+
+	//HTTP client used to call the realted APIs of the backend chart repositories
+	apiClient *ChartClient
+
+	//Point to the url of the backend server
+	backendServerAddress *url.URL
 }
 
 //ListCharts lists all the charts under the specified namespace
 func (mh *ManipulationHandler) ListCharts(w http.ResponseWriter, req *http.Request) {
-	mh.trafficProxy.ServeHTTP(w, req)
+	rootURL := strings.TrimSuffix(mh.backendServerAddress.String(), "/")
+	fullURL := fmt.Sprintf("%s%s", rootURL, req.RequestURI)
+
+	content, err := mh.apiClient.GetContent(fullURL)
+	if err != nil {
+		writeInternalError(w, err)
+		return
+	}
+
+	chartList, err := mh.chartOperator.GetChartList(content)
+	if err != nil {
+		writeInternalError(w, err)
+		return
+	}
+
+	jsonData, err := json.Marshal(chartList)
+	if err != nil {
+		writeInternalError(w, err)
+		return
+	}
+
+	writeJSONData(w, jsonData)
 }
 
 //GetChart returns all the chart versions under the specified chart
@@ -29,8 +63,35 @@ func (mh *ManipulationHandler) GetChart(w http.ResponseWriter, req *http.Request
 //This handler should return the details of the chart version,
 //maybe including metadata,dependencies and values etc.
 func (mh *ManipulationHandler) GetChartVersion(w http.ResponseWriter, req *http.Request) {
-	w.WriteHeader(http.StatusNotImplemented)
-	w.Write([]byte("not implemented"))
+	chartV, err := mh.getChartVersion(req.RequestURI)
+	if err != nil {
+		writeInternalError(w, err)
+		return
+	}
+
+	//TODO:
+	namespace := "repo2"
+	content, err := mh.getChartVersionContent(namespace, chartV.URLs[0])
+	if err != nil {
+		writeInternalError(w, err)
+		return
+	}
+
+	//Process bytes and get more details of chart version
+	chartDetails, err := mh.chartOperator.GetChartDetails(content)
+	if err != nil {
+		writeInternalError(w, err)
+		return
+	}
+	chartDetails.Metadata = chartV
+
+	bytes, err := json.Marshal(chartDetails)
+	if err != nil {
+		writeInternalError(w, err)
+		return
+	}
+
+	writeJSONData(w, bytes)
 }
 
 //UploadChartVersion will save the new version of the chart to the backend storage
@@ -47,3 +108,29 @@ func (mh *ManipulationHandler) UploadProvenanceFile(w http.ResponseWriter, req *
 func (mh *ManipulationHandler) DeleteChartVersion(w http.ResponseWriter, req *http.Request) {
 	mh.trafficProxy.ServeHTTP(w, req)
 }
+
+//Get the basic metadata of chart version
+func (mh *ManipulationHandler) getChartVersion(path string) (*helm_repo.ChartVersion, error) {
+	rootURL := strings.TrimSuffix(mh.backendServerAddress.String(), "/")
+	fullURL := fmt.Sprintf("%s%s", rootURL, path)
+
+	content, err := mh.apiClient.GetContent(fullURL)
+	if err != nil {
+		return nil, err
+	}
+
+	chartVersion := &helm_repo.ChartVersion{}
+	if err := yaml.Unmarshal(content, chartVersion); err != nil {
+		return nil, err
+	}
+
+	return chartVersion, nil
+}
+
+//Get the content bytes of the chart version
+func (mh *ManipulationHandler) getChartVersionContent(namespace string, path string) ([]byte, error) {
+	rootURL := strings.TrimSuffix(mh.backendServerAddress.String(), "/")
+	fullPath := fmt.Sprintf("%s/%s/%s", rootURL, namespace, path)
+
+	return mh.apiClient.GetContent(fullPath)
+}
diff --git a/src/chartserver/repo_handler.go b/src/chartserver/repo_handler.go
index 372296599..39a572820 100644
--- a/src/chartserver/repo_handler.go
+++ b/src/chartserver/repo_handler.go
@@ -4,10 +4,8 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"net/url"
-	"os"
 	"strings"
 	"sync"
 	"sync/atomic"
@@ -30,7 +28,7 @@ type RepositoryHandler struct {
 	trafficProxy *ProxyEngine
 
 	//HTTP client used to call the realted APIs of the backend chart repositories
-	apiClient *http.Client
+	apiClient *ChartClient
 
 	//Point to the url of the backend server
 	backendServerAddress *url.URL
@@ -60,14 +58,14 @@ func (rh *RepositoryHandler) GetIndexFile(w http.ResponseWriter, req *http.Reque
 	//Get project manager references
 	projectMgr, err := filter.GetProjectManager(req)
 	if err != nil {
-		writeError(w, http.StatusInternalServerError, err)
+		writeInternalError(w, err)
 		return
 	}
 
 	//Get all the projects
 	results, err := projectMgr.List(nil)
 	if err != nil {
-		writeError(w, http.StatusInternalServerError, err)
+		writeInternalError(w, err)
 		return
 	}
 
@@ -161,7 +159,7 @@ LOOP:
 			writeError(w, http.StatusInternalServerError, err)
 			return
 		case <-req.Context().Done():
-			writeError(w, http.StatusInternalServerError, errors.New("request aborted"))
+			writeInternalError(w, errors.New("request aborted"))
 			return
 		}
 	}
@@ -187,7 +185,7 @@ LOOP:
 
 	bytes, err := yaml.Marshal(mergedIndexFile)
 	if err != nil {
-		writeError(w, http.StatusInternalServerError, err)
+		writeInternalError(w, err)
 		return
 	}
 
@@ -206,29 +204,12 @@ func (rh *RepositoryHandler) getIndexYamlWithNS(namespace string) (*helm_repo.In
 	rootURL := strings.TrimSuffix(rh.backendServerAddress.String(), "/")
 	url := fmt.Sprintf("%s/%s/index.yaml", rootURL, namespace)
 
-	request, err := http.NewRequest(http.MethodGet, url, nil)
+	content, err := rh.apiClient.GetContent(url)
 	if err != nil {
 		return nil, err
 	}
 
-	//Set basic auth
-	request.SetBasicAuth(userName, os.Getenv(passwordKey))
-
-	response, err := rh.apiClient.Do(request)
-	if err != nil {
-		return nil, err
-	}
-
-	if response.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("failed to retrieve the index.yaml under repo %s", namespace)
-	}
-
-	content, err := ioutil.ReadAll(response.Body)
-	if err != nil {
-		return nil, err
-	}
-	defer response.Body.Close()
-
+	//Traverse to index file object for merging
 	indexFile := helm_repo.NewIndexFile()
 	if err := yaml.Unmarshal(content, indexFile); err != nil {
 		return nil, err
@@ -276,12 +257,3 @@ func emptyIndexFile() []byte {
 
 	return rawData
 }
-
-func writeError(w http.ResponseWriter, code int, err error) {
-	errorObj := make(map[string]string)
-	errorObj["error"] = err.Error()
-	errorContent, _ := json.Marshal(errorObj)
-
-	w.WriteHeader(code)
-	w.Write(errorContent)
-}
diff --git a/src/chartserver/utils.go b/src/chartserver/utils.go
new file mode 100644
index 000000000..fb69376d6
--- /dev/null
+++ b/src/chartserver/utils.go
@@ -0,0 +1,33 @@
+package chartserver
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+const (
+	contentTypeHeader = "content-type"
+	contentTypeJSON   = "application/json"
+)
+
+//Write error to http client
+func writeError(w http.ResponseWriter, code int, err error) {
+	errorObj := make(map[string]string)
+	errorObj["error"] = err.Error()
+	errorContent, _ := json.Marshal(errorObj)
+
+	w.WriteHeader(code)
+	w.Write(errorContent)
+}
+
+//StatusCode == 500
+func writeInternalError(w http.ResponseWriter, err error) {
+	writeError(w, http.StatusInternalServerError, err)
+}
+
+//Write JSON data to http client
+func writeJSONData(w http.ResponseWriter, data []byte) {
+	w.Header().Set(contentTypeHeader, contentTypeJSON)
+	w.WriteHeader(http.StatusOK)
+	w.Write(data)
+}
diff --git a/src/vendor/github.com/blang/semver/.gx/lastpubver b/src/vendor/github.com/blang/semver/.gx/lastpubver
new file mode 100644
index 000000000..27ed26783
--- /dev/null
+++ b/src/vendor/github.com/blang/semver/.gx/lastpubver
@@ -0,0 +1 @@
+3.5.1: QmYRGECuvQnRX73fcvPnGbYijBcGN2HbKZQ7jh26qmLiHG
diff --git a/src/vendor/github.com/blang/semver/.travis.yml b/src/vendor/github.com/blang/semver/.travis.yml
new file mode 100644
index 000000000..102fb9a69
--- /dev/null
+++ b/src/vendor/github.com/blang/semver/.travis.yml
@@ -0,0 +1,21 @@
+language: go
+matrix:
+  include:
+  - go: 1.4.3
+  - go: 1.5.4
+  - go: 1.6.3
+  - go: 1.7
+  - go: tip
+  allow_failures:
+  - go: tip
+install:
+- go get golang.org/x/tools/cmd/cover
+- go get github.com/mattn/goveralls
+script:
+- echo "Test and track coverage" ; $HOME/gopath/bin/goveralls -package "." -service=travis-ci
+  -repotoken $COVERALLS_TOKEN
+- echo "Build examples" ; cd examples && go build
+- echo "Check if gofmt'd" ; diff -u <(echo -n) <(gofmt -d -s .)
+env:
+  global:
+    secure: HroGEAUQpVq9zX1b1VIkraLiywhGbzvNnTZq2TMxgK7JHP8xqNplAeF1izrR2i4QLL9nsY+9WtYss4QuPvEtZcVHUobw6XnL6radF7jS1LgfYZ9Y7oF+zogZ2I5QUMRLGA7rcxQ05s7mKq3XZQfeqaNts4bms/eZRefWuaFZbkw=
diff --git a/src/vendor/github.com/blang/semver/LICENSE b/src/vendor/github.com/blang/semver/LICENSE
new file mode 100644
index 000000000..5ba5c86fc
--- /dev/null
+++ b/src/vendor/github.com/blang/semver/LICENSE
@@ -0,0 +1,22 @@
+The MIT License
+
+Copyright (c) 2014 Benedikt Lang <github at benediktlang.de>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
diff --git a/src/vendor/github.com/blang/semver/README.md b/src/vendor/github.com/blang/semver/README.md
new file mode 100644
index 000000000..08b2e4a3d
--- /dev/null
+++ b/src/vendor/github.com/blang/semver/README.md
@@ -0,0 +1,194 @@
+semver for golang [![Build Status](https://travis-ci.org/blang/semver.svg?branch=master)](https://travis-ci.org/blang/semver) [![GoDoc](https://godoc.org/github.com/blang/semver?status.png)](https://godoc.org/github.com/blang/semver) [![Coverage Status](https://img.shields.io/coveralls/blang/semver.svg)](https://coveralls.io/r/blang/semver?branch=master)
+======
+
+semver is a [Semantic Versioning](http://semver.org/) library written in golang. It fully covers spec version `2.0.0`.
+
+Usage
+-----
+```bash
+$ go get github.com/blang/semver
+```
+Note: Always vendor your dependencies or fix on a specific version tag.
+
+```go
+import github.com/blang/semver
+v1, err := semver.Make("1.0.0-beta")
+v2, err := semver.Make("2.0.0-beta")
+v1.Compare(v2)
+```
+
+Also check the [GoDocs](http://godoc.org/github.com/blang/semver).
+
+Why should I use this lib?
+-----
+
+- Fully spec compatible
+- No reflection
+- No regex
+- Fully tested (Coverage >99%)
+- Readable parsing/validation errors
+- Fast (See [Benchmarks](#benchmarks))
+- Only Stdlib
+- Uses values instead of pointers
+- Many features, see below
+
+
+Features
+-----
+
+- Parsing and validation at all levels
+- Comparator-like comparisons
+- Compare Helper Methods
+- InPlace manipulation
+- Ranges `>=1.0.0 <2.0.0 || >=3.0.0 !3.0.1-beta.1`
+- Wildcards `>=1.x`, `<=2.5.x`
+- Sortable (implements sort.Interface)
+- database/sql compatible (sql.Scanner/Valuer)
+- encoding/json compatible (json.Marshaler/Unmarshaler)
+
+Ranges
+------
+
+A `Range` is a set of conditions which specify which versions satisfy the range.
+
+A condition is composed of an operator and a version. The supported operators are:
+
+- `<1.0.0` Less than `1.0.0`
+- `<=1.0.0` Less than or equal to `1.0.0`
+- `>1.0.0` Greater than `1.0.0`
+- `>=1.0.0` Greater than or equal to `1.0.0`
+- `1.0.0`, `=1.0.0`, `==1.0.0` Equal to `1.0.0`
+- `!1.0.0`, `!=1.0.0` Not equal to `1.0.0`. Excludes version `1.0.0`.
+
+Note that spaces between the operator and the version will be gracefully tolerated.
+
+A `Range` can link multiple `Ranges` separated by space:
+
+Ranges can be linked by logical AND:
+
+  - `>1.0.0 <2.0.0` would match between both ranges, so `1.1.1` and `1.8.7` but not `1.0.0` or `2.0.0`
+  - `>1.0.0 <3.0.0 !2.0.3-beta.2` would match every version between `1.0.0` and `3.0.0` except `2.0.3-beta.2`
+
+Ranges can also be linked by logical OR:
+
+  - `<2.0.0 || >=3.0.0` would match `1.x.x` and `3.x.x` but not `2.x.x`
+
+AND has a higher precedence than OR. It's not possible to use brackets.
+
+Ranges can be combined by both AND and OR
+
+  - `>1.0.0 <2.0.0 || >3.0.0 !4.2.1` would match `1.2.3`, `1.9.9`, `3.1.1`, but not `4.2.1`, `2.1.1`
+
+Range usage:
+
+```
+v, err := semver.Parse("1.2.3")
+range, err := semver.ParseRange(">1.0.0 <2.0.0 || >=3.0.0")
+if range(v) {
+    //valid
+}
+
+```
+
+Example
+-----
+
+Have a look at full examples in [examples/main.go](examples/main.go)
+
+```go
+import github.com/blang/semver
+
+v, err := semver.Make("0.0.1-alpha.preview+123.github")
+fmt.Printf("Major: %d\n", v.Major)
+fmt.Printf("Minor: %d\n", v.Minor)
+fmt.Printf("Patch: %d\n", v.Patch)
+fmt.Printf("Pre: %s\n", v.Pre)
+fmt.Printf("Build: %s\n", v.Build)
+
+// Prerelease versions array
+if len(v.Pre) > 0 {
+    fmt.Println("Prerelease versions:")
+    for i, pre := range v.Pre {
+        fmt.Printf("%d: %q\n", i, pre)
+    }
+}
+
+// Build meta data array
+if len(v.Build) > 0 {
+    fmt.Println("Build meta data:")
+    for i, build := range v.Build {
+        fmt.Printf("%d: %q\n", i, build)
+    }
+}
+
+v001, err := semver.Make("0.0.1")
+// Compare using helpers: v.GT(v2), v.LT, v.GTE, v.LTE
+v001.GT(v) == true
+v.LT(v001) == true
+v.GTE(v) == true
+v.LTE(v) == true
+
+// Or use v.Compare(v2) for comparisons (-1, 0, 1):
+v001.Compare(v) == 1
+v.Compare(v001) == -1
+v.Compare(v) == 0
+
+// Manipulate Version in place:
+v.Pre[0], err = semver.NewPRVersion("beta")
+if err != nil {
+    fmt.Printf("Error parsing pre release version: %q", err)
+}
+
+fmt.Println("\nValidate versions:")
+v.Build[0] = "?"
+
+err = v.Validate()
+if err != nil {
+    fmt.Printf("Validation failed: %s\n", err)
+}
+```
+
+
+Benchmarks
+-----
+
+    BenchmarkParseSimple-4           5000000    390    ns/op    48 B/op   1 allocs/op
+    BenchmarkParseComplex-4          1000000   1813    ns/op   256 B/op   7 allocs/op
+    BenchmarkParseAverage-4          1000000   1171    ns/op   163 B/op   4 allocs/op
+    BenchmarkStringSimple-4         20000000    119    ns/op    16 B/op   1 allocs/op
+    BenchmarkStringLarger-4         10000000    206    ns/op    32 B/op   2 allocs/op
+    BenchmarkStringComplex-4         5000000    324    ns/op    80 B/op   3 allocs/op
+    BenchmarkStringAverage-4         5000000    273    ns/op    53 B/op   2 allocs/op
+    BenchmarkValidateSimple-4      200000000      9.33 ns/op     0 B/op   0 allocs/op
+    BenchmarkValidateComplex-4       3000000    469    ns/op     0 B/op   0 allocs/op
+    BenchmarkValidateAverage-4       5000000    256    ns/op     0 B/op   0 allocs/op
+    BenchmarkCompareSimple-4       100000000     11.8  ns/op     0 B/op   0 allocs/op
+    BenchmarkCompareComplex-4       50000000     30.8  ns/op     0 B/op   0 allocs/op
+    BenchmarkCompareAverage-4       30000000     41.5  ns/op     0 B/op   0 allocs/op
+    BenchmarkSort-4                  3000000    419    ns/op   256 B/op   2 allocs/op
+    BenchmarkRangeParseSimple-4      2000000    850    ns/op   192 B/op   5 allocs/op
+    BenchmarkRangeParseAverage-4     1000000   1677    ns/op   400 B/op  10 allocs/op
+    BenchmarkRangeParseComplex-4      300000   5214    ns/op  1440 B/op  30 allocs/op
+    BenchmarkRangeMatchSimple-4     50000000     25.6  ns/op     0 B/op   0 allocs/op
+    BenchmarkRangeMatchAverage-4    30000000     56.4  ns/op     0 B/op   0 allocs/op
+    BenchmarkRangeMatchComplex-4    10000000    153    ns/op     0 B/op   0 allocs/op
+
+See benchmark cases at [semver_test.go](semver_test.go)
+
+
+Motivation
+-----
+
+I simply couldn't find any lib supporting the full spec. Others were just wrong or used reflection and regex which i don't like.
+
+
+Contribution
+-----
+
+Feel free to make a pull request. For bigger changes create a issue first to discuss about it.
+
+
+License
+-----
+
+See [LICENSE](LICENSE) file.
diff --git a/src/vendor/github.com/blang/semver/examples/main.go b/src/vendor/github.com/blang/semver/examples/main.go
new file mode 100644
index 000000000..f36c983d9
--- /dev/null
+++ b/src/vendor/github.com/blang/semver/examples/main.go
@@ -0,0 +1,83 @@
+package main
+
+import (
+	"fmt"
+	"github.com/blang/semver"
+)
+
+func main() {
+	v, err := semver.Parse("0.0.1-alpha.preview.222+123.github")
+	if err != nil {
+		fmt.Printf("Error while parsing (not valid): %q", err)
+	}
+	fmt.Printf("Version to string: %q\n", v)
+
+	fmt.Printf("Major: %d\n", v.Major)
+	fmt.Printf("Minor: %d\n", v.Minor)
+	fmt.Printf("Patch: %d\n", v.Patch)
+
+	// Prerelease versions
+	if len(v.Pre) > 0 {
+		fmt.Println("Prerelease versions:")
+		for i, pre := range v.Pre {
+			fmt.Printf("%d: %q\n", i, pre)
+		}
+	}
+
+	// Build meta data
+	if len(v.Build) > 0 {
+		fmt.Println("Build meta data:")
+		for i, build := range v.Build {
+			fmt.Printf("%d: %q\n", i, build)
+		}
+	}
+
+	// Make == Parse (Value), New for Pointer
+	v001, err := semver.Make("0.0.1")
+
+	fmt.Println("\nUse Version.Compare for comparisons (-1, 0, 1):")
+	fmt.Printf("%q is greater than %q: Compare == %d\n", v001, v, v001.Compare(v))
+	fmt.Printf("%q is less than %q: Compare == %d\n", v, v001, v.Compare(v001))
+	fmt.Printf("%q is equal to %q: Compare == %d\n", v, v, v.Compare(v))
+
+	fmt.Println("\nUse comparison helpers returning booleans:")
+	fmt.Printf("%q is greater than %q: %t\n", v001, v, v001.GT(v))
+	fmt.Printf("%q is greater than equal %q: %t\n", v001, v, v001.GTE(v))
+	fmt.Printf("%q is greater than equal %q: %t\n", v, v, v.GTE(v))
+	fmt.Printf("%q is less than %q: %t\n", v, v001, v.LT(v001))
+	fmt.Printf("%q is less than equal %q: %t\n", v, v001, v.LTE(v001))
+	fmt.Printf("%q is less than equal %q: %t\n", v, v, v.LTE(v))
+
+	fmt.Println("\nManipulate Version in place:")
+	v.Pre[0], err = semver.NewPRVersion("beta")
+	if err != nil {
+		fmt.Printf("Error parsing pre release version: %q", err)
+	}
+	fmt.Printf("Version to string: %q\n", v)
+
+	fmt.Println("\nCompare Prerelease versions:")
+	pre1, _ := semver.NewPRVersion("123")
+	pre2, _ := semver.NewPRVersion("alpha")
+	pre3, _ := semver.NewPRVersion("124")
+	fmt.Printf("%q is less than %q: Compare == %d\n", pre1, pre2, pre1.Compare(pre2))
+	fmt.Printf("%q is greater than %q: Compare == %d\n", pre3, pre1, pre3.Compare(pre1))
+	fmt.Printf("%q is equal to %q: Compare == %d\n", pre1, pre1, pre1.Compare(pre1))
+
+	fmt.Println("\nValidate versions:")
+	v.Build[0] = "?"
+
+	err = v.Validate()
+	if err != nil {
+		fmt.Printf("Validation failed: %s\n", err)
+	}
+
+	fmt.Println("Create valid build meta data:")
+	b1, _ := semver.NewBuildVersion("build123")
+	v.Build[0] = b1
+	fmt.Printf("Version with new build version %q\n", v)
+
+	_, err = semver.NewBuildVersion("build?123")
+	if err != nil {
+		fmt.Printf("Create build version failed: %s\n", err)
+	}
+}
diff --git a/src/vendor/github.com/blang/semver/json.go b/src/vendor/github.com/blang/semver/json.go
new file mode 100644
index 000000000..a74bf7c44
--- /dev/null
+++ b/src/vendor/github.com/blang/semver/json.go
@@ -0,0 +1,23 @@
+package semver
+
+import (
+	"encoding/json"
+)
+
+// MarshalJSON implements the encoding/json.Marshaler interface.
+func (v Version) MarshalJSON() ([]byte, error) {
+	return json.Marshal(v.String())
+}
+
+// UnmarshalJSON implements the encoding/json.Unmarshaler interface.
+func (v *Version) UnmarshalJSON(data []byte) (err error) {
+	var versionString string
+
+	if err = json.Unmarshal(data, &versionString); err != nil {
+		return
+	}
+
+	*v, err = Parse(versionString)
+
+	return
+}
diff --git a/src/vendor/github.com/blang/semver/json_test.go b/src/vendor/github.com/blang/semver/json_test.go
new file mode 100644
index 000000000..c635dea16
--- /dev/null
+++ b/src/vendor/github.com/blang/semver/json_test.go
@@ -0,0 +1,49 @@
+package semver
+
+import (
+	"encoding/json"
+	"strconv"
+	"testing"
+)
+
+func TestJSONMarshal(t *testing.T) {
+	versionString := "3.1.4-alpha.1.5.9+build.2.6.5"
+	v, err := Parse(versionString)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	versionJSON, err := json.Marshal(v)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	quotedVersionString := strconv.Quote(versionString)
+
+	if string(versionJSON) != quotedVersionString {
+		t.Fatalf("JSON marshaled semantic version not equal: expected %q, got %q", quotedVersionString, string(versionJSON))
+	}
+}
+
+func TestJSONUnmarshal(t *testing.T) {
+	versionString := "3.1.4-alpha.1.5.9+build.2.6.5"
+	quotedVersionString := strconv.Quote(versionString)
+
+	var v Version
+	if err := json.Unmarshal([]byte(quotedVersionString), &v); err != nil {
+		t.Fatal(err)
+	}
+
+	if v.String() != versionString {
+		t.Fatalf("JSON unmarshaled semantic version not equal: expected %q, got %q", versionString, v.String())
+	}
+
+	badVersionString := strconv.Quote("3.1.4.1.5.9.2.6.5-other-digits-of-pi")
+	if err := json.Unmarshal([]byte(badVersionString), &v); err == nil {
+		t.Fatal("expected JSON unmarshal error, got nil")
+	}
+
+	if err := json.Unmarshal([]byte("3.1"), &v); err == nil {
+		t.Fatal("expected JSON unmarshal error, got nil")
+	}
+}
diff --git a/src/vendor/github.com/blang/semver/package.json b/src/vendor/github.com/blang/semver/package.json
new file mode 100644
index 000000000..1cf8ebdd9
--- /dev/null
+++ b/src/vendor/github.com/blang/semver/package.json
@@ -0,0 +1,17 @@
+{
+  "author": "blang",
+  "bugs": {
+    "URL": "https://github.com/blang/semver/issues",
+    "url": "https://github.com/blang/semver/issues"
+  },
+  "gx": {
+    "dvcsimport": "github.com/blang/semver"
+  },
+  "gxVersion": "0.10.0",
+  "language": "go",
+  "license": "MIT",
+  "name": "semver",
+  "releaseCmd": "git commit -a -m \"gx publish $VERSION\"",
+  "version": "3.5.1"
+}
+
diff --git a/src/vendor/github.com/blang/semver/range.go b/src/vendor/github.com/blang/semver/range.go
new file mode 100644
index 000000000..fca406d47
--- /dev/null
+++ b/src/vendor/github.com/blang/semver/range.go
@@ -0,0 +1,416 @@
+package semver
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+	"unicode"
+)
+
+type wildcardType int
+
+const (
+	noneWildcard  wildcardType = iota
+	majorWildcard wildcardType = 1
+	minorWildcard wildcardType = 2
+	patchWildcard wildcardType = 3
+)
+
+func wildcardTypefromInt(i int) wildcardType {
+	switch i {
+	case 1:
+		return majorWildcard
+	case 2:
+		return minorWildcard
+	case 3:
+		return patchWildcard
+	default:
+		return noneWildcard
+	}
+}
+
+type comparator func(Version, Version) bool
+
+var (
+	compEQ comparator = func(v1 Version, v2 Version) bool {
+		return v1.Compare(v2) == 0
+	}
+	compNE = func(v1 Version, v2 Version) bool {
+		return v1.Compare(v2) != 0
+	}
+	compGT = func(v1 Version, v2 Version) bool {
+		return v1.Compare(v2) == 1
+	}
+	compGE = func(v1 Version, v2 Version) bool {
+		return v1.Compare(v2) >= 0
+	}
+	compLT = func(v1 Version, v2 Version) bool {
+		return v1.Compare(v2) == -1
+	}
+	compLE = func(v1 Version, v2 Version) bool {
+		return v1.Compare(v2) <= 0
+	}
+)
+
+type versionRange struct {
+	v Version
+	c comparator
+}
+
+// rangeFunc creates a Range from the given versionRange.
+func (vr *versionRange) rangeFunc() Range {
+	return Range(func(v Version) bool {
+		return vr.c(v, vr.v)
+	})
+}
+
+// Range represents a range of versions.
+// A Range can be used to check if a Version satisfies it:
+//
+//     range, err := semver.ParseRange(">1.0.0 <2.0.0")
+//     range(semver.MustParse("1.1.1") // returns true
+type Range func(Version) bool
+
+// OR combines the existing Range with another Range using logical OR.
+func (rf Range) OR(f Range) Range {
+	return Range(func(v Version) bool {
+		return rf(v) || f(v)
+	})
+}
+
+// AND combines the existing Range with another Range using logical AND.
+func (rf Range) AND(f Range) Range {
+	return Range(func(v Version) bool {
+		return rf(v) && f(v)
+	})
+}
+
+// ParseRange parses a range and returns a Range.
+// If the range could not be parsed an error is returned.
+//
+// Valid ranges are:
+//   - "<1.0.0"
+//   - "<=1.0.0"
+//   - ">1.0.0"
+//   - ">=1.0.0"
+//   - "1.0.0", "=1.0.0", "==1.0.0"
+//   - "!1.0.0", "!=1.0.0"
+//
+// A Range can consist of multiple ranges separated by space:
+// Ranges can be linked by logical AND:
+//   - ">1.0.0 <2.0.0" would match between both ranges, so "1.1.1" and "1.8.7" but not "1.0.0" or "2.0.0"
+//   - ">1.0.0 <3.0.0 !2.0.3-beta.2" would match every version between 1.0.0 and 3.0.0 except 2.0.3-beta.2
+//
+// Ranges can also be linked by logical OR:
+//   - "<2.0.0 || >=3.0.0" would match "1.x.x" and "3.x.x" but not "2.x.x"
+//
+// AND has a higher precedence than OR. It's not possible to use brackets.
+//
+// Ranges can be combined by both AND and OR
+//
+//  - `>1.0.0 <2.0.0 || >3.0.0 !4.2.1` would match `1.2.3`, `1.9.9`, `3.1.1`, but not `4.2.1`, `2.1.1`
+func ParseRange(s string) (Range, error) {
+	parts := splitAndTrim(s)
+	orParts, err := splitORParts(parts)
+	if err != nil {
+		return nil, err
+	}
+	expandedParts, err := expandWildcardVersion(orParts)
+	if err != nil {
+		return nil, err
+	}
+	var orFn Range
+	for _, p := range expandedParts {
+		var andFn Range
+		for _, ap := range p {
+			opStr, vStr, err := splitComparatorVersion(ap)
+			if err != nil {
+				return nil, err
+			}
+			vr, err := buildVersionRange(opStr, vStr)
+			if err != nil {
+				return nil, fmt.Errorf("Could not parse Range %q: %s", ap, err)
+			}
+			rf := vr.rangeFunc()
+
+			// Set function
+			if andFn == nil {
+				andFn = rf
+			} else { // Combine with existing function
+				andFn = andFn.AND(rf)
+			}
+		}
+		if orFn == nil {
+			orFn = andFn
+		} else {
+			orFn = orFn.OR(andFn)
+		}
+
+	}
+	return orFn, nil
+}
+
+// splitORParts splits the already cleaned parts by '||'.
+// Checks for invalid positions of the operator and returns an
+// error if found.
+func splitORParts(parts []string) ([][]string, error) {
+	var ORparts [][]string
+	last := 0
+	for i, p := range parts {
+		if p == "||" {
+			if i == 0 {
+				return nil, fmt.Errorf("First element in range is '||'")
+			}
+			ORparts = append(ORparts, parts[last:i])
+			last = i + 1
+		}
+	}
+	if last == len(parts) {
+		return nil, fmt.Errorf("Last element in range is '||'")
+	}
+	ORparts = append(ORparts, parts[last:])
+	return ORparts, nil
+}
+
+// buildVersionRange takes a slice of 2: operator and version
+// and builds a versionRange, otherwise an error.
+func buildVersionRange(opStr, vStr string) (*versionRange, error) {
+	c := parseComparator(opStr)
+	if c == nil {
+		return nil, fmt.Errorf("Could not parse comparator %q in %q", opStr, strings.Join([]string{opStr, vStr}, ""))
+	}
+	v, err := Parse(vStr)
+	if err != nil {
+		return nil, fmt.Errorf("Could not parse version %q in %q: %s", vStr, strings.Join([]string{opStr, vStr}, ""), err)
+	}
+
+	return &versionRange{
+		v: v,
+		c: c,
+	}, nil
+
+}
+
+// inArray checks if a byte is contained in an array of bytes
+func inArray(s byte, list []byte) bool {
+	for _, el := range list {
+		if el == s {
+			return true
+		}
+	}
+	return false
+}
+
+// splitAndTrim splits a range string by spaces and cleans whitespaces
+func splitAndTrim(s string) (result []string) {
+	last := 0
+	var lastChar byte
+	excludeFromSplit := []byte{'>', '<', '='}
+	for i := 0; i < len(s); i++ {
+		if s[i] == ' ' && !inArray(lastChar, excludeFromSplit) {
+			if last < i-1 {
+				result = append(result, s[last:i])
+			}
+			last = i + 1
+		} else if s[i] != ' ' {
+			lastChar = s[i]
+		}
+	}
+	if last < len(s)-1 {
+		result = append(result, s[last:])
+	}
+
+	for i, v := range result {
+		result[i] = strings.Replace(v, " ", "", -1)
+	}
+
+	// parts := strings.Split(s, " ")
+	// for _, x := range parts {
+	// 	if s := strings.TrimSpace(x); len(s) != 0 {
+	// 		result = append(result, s)
+	// 	}
+	// }
+	return
+}
+
+// splitComparatorVersion splits the comparator from the version.
+// Input must be free of leading or trailing spaces.
+func splitComparatorVersion(s string) (string, string, error) {
+	i := strings.IndexFunc(s, unicode.IsDigit)
+	if i == -1 {
+		return "", "", fmt.Errorf("Could not get version from string: %q", s)
+	}
+	return strings.TrimSpace(s[0:i]), s[i:], nil
+}
+
+// getWildcardType will return the type of wildcard that the
+// passed version contains
+func getWildcardType(vStr string) wildcardType {
+	parts := strings.Split(vStr, ".")
+	nparts := len(parts)
+	wildcard := parts[nparts-1]
+
+	possibleWildcardType := wildcardTypefromInt(nparts)
+	if wildcard == "x" {
+		return possibleWildcardType
+	}
+
+	return noneWildcard
+}
+
+// createVersionFromWildcard will convert a wildcard version
+// into a regular version, replacing 'x's with '0's, handling
+// special cases like '1.x.x' and '1.x'
+func createVersionFromWildcard(vStr string) string {
+	// handle 1.x.x
+	vStr2 := strings.Replace(vStr, ".x.x", ".x", 1)
+	vStr2 = strings.Replace(vStr2, ".x", ".0", 1)
+	parts := strings.Split(vStr2, ".")
+
+	// handle 1.x
+	if len(parts) == 2 {
+		return vStr2 + ".0"
+	}
+
+	return vStr2
+}
+
+// incrementMajorVersion will increment the major version
+// of the passed version
+func incrementMajorVersion(vStr string) (string, error) {
+	parts := strings.Split(vStr, ".")
+	i, err := strconv.Atoi(parts[0])
+	if err != nil {
+		return "", err
+	}
+	parts[0] = strconv.Itoa(i + 1)
+
+	return strings.Join(parts, "."), nil
+}
+
+// incrementMajorVersion will increment the minor version
+// of the passed version
+func incrementMinorVersion(vStr string) (string, error) {
+	parts := strings.Split(vStr, ".")
+	i, err := strconv.Atoi(parts[1])
+	if err != nil {
+		return "", err
+	}
+	parts[1] = strconv.Itoa(i + 1)
+
+	return strings.Join(parts, "."), nil
+}
+
+// expandWildcardVersion will expand wildcards inside versions
+// following these rules:
+//
+// * when dealing with patch wildcards:
+// >= 1.2.x    will become    >= 1.2.0
+// <= 1.2.x    will become    <  1.3.0
+// >  1.2.x    will become    >= 1.3.0
+// <  1.2.x    will become    <  1.2.0
+// != 1.2.x    will become    <  1.2.0 >= 1.3.0
+//
+// * when dealing with minor wildcards:
+// >= 1.x      will become    >= 1.0.0
+// <= 1.x      will become    <  2.0.0
+// >  1.x      will become    >= 2.0.0
+// <  1.0      will become    <  1.0.0
+// != 1.x      will become    <  1.0.0 >= 2.0.0
+//
+// * when dealing with wildcards without
+// version operator:
+// 1.2.x       will become    >= 1.2.0 < 1.3.0
+// 1.x         will become    >= 1.0.0 < 2.0.0
+func expandWildcardVersion(parts [][]string) ([][]string, error) {
+	var expandedParts [][]string
+	for _, p := range parts {
+		var newParts []string
+		for _, ap := range p {
+			if strings.Index(ap, "x") != -1 {
+				opStr, vStr, err := splitComparatorVersion(ap)
+				if err != nil {
+					return nil, err
+				}
+
+				versionWildcardType := getWildcardType(vStr)
+				flatVersion := createVersionFromWildcard(vStr)
+
+				var resultOperator string
+				var shouldIncrementVersion bool
+				switch opStr {
+				case ">":
+					resultOperator = ">="
+					shouldIncrementVersion = true
+				case ">=":
+					resultOperator = ">="
+				case "<":
+					resultOperator = "<"
+				case "<=":
+					resultOperator = "<"
+					shouldIncrementVersion = true
+				case "", "=", "==":
+					newParts = append(newParts, ">="+flatVersion)
+					resultOperator = "<"
+					shouldIncrementVersion = true
+				case "!=", "!":
+					newParts = append(newParts, "<"+flatVersion)
+					resultOperator = ">="
+					shouldIncrementVersion = true
+				}
+
+				var resultVersion string
+				if shouldIncrementVersion {
+					switch versionWildcardType {
+					case patchWildcard:
+						resultVersion, _ = incrementMinorVersion(flatVersion)
+					case minorWildcard:
+						resultVersion, _ = incrementMajorVersion(flatVersion)
+					}
+				} else {
+					resultVersion = flatVersion
+				}
+
+				ap = resultOperator + resultVersion
+			}
+			newParts = append(newParts, ap)
+		}
+		expandedParts = append(expandedParts, newParts)
+	}
+
+	return expandedParts, nil
+}
+
+func parseComparator(s string) comparator {
+	switch s {
+	case "==":
+		fallthrough
+	case "":
+		fallthrough
+	case "=":
+		return compEQ
+	case ">":
+		return compGT
+	case ">=":
+		return compGE
+	case "<":
+		return compLT
+	case "<=":
+		return compLE
+	case "!":
+		fallthrough
+	case "!=":
+		return compNE
+	}
+
+	return nil
+}
+
+// MustParseRange is like ParseRange but panics if the range cannot be parsed.
+func MustParseRange(s string) Range {
+	r, err := ParseRange(s)
+	if err != nil {
+		panic(`semver: ParseRange(` + s + `): ` + err.Error())
+	}
+	return r
+}
diff --git a/src/vendor/github.com/blang/semver/range_test.go b/src/vendor/github.com/blang/semver/range_test.go
new file mode 100644
index 000000000..83ee9c787
--- /dev/null
+++ b/src/vendor/github.com/blang/semver/range_test.go
@@ -0,0 +1,581 @@
+package semver
+
+import (
+	"reflect"
+	"strings"
+	"testing"
+)
+
+type wildcardTypeTest struct {
+	input        string
+	wildcardType wildcardType
+}
+
+type comparatorTest struct {
+	input      string
+	comparator func(comparator) bool
+}
+
+func TestParseComparator(t *testing.T) {
+	compatorTests := []comparatorTest{
+		{">", testGT},
+		{">=", testGE},
+		{"<", testLT},
+		{"<=", testLE},
+		{"", testEQ},
+		{"=", testEQ},
+		{"==", testEQ},
+		{"!=", testNE},
+		{"!", testNE},
+		{"-", nil},
+		{"<==", nil},
+		{"<<", nil},
+		{">>", nil},
+	}
+
+	for _, tc := range compatorTests {
+		if c := parseComparator(tc.input); c == nil {
+			if tc.comparator != nil {
+				t.Errorf("Comparator nil for case %q\n", tc.input)
+			}
+		} else if !tc.comparator(c) {
+			t.Errorf("Invalid comparator for case %q\n", tc.input)
+		}
+	}
+}
+
+var (
+	v1 = MustParse("1.2.2")
+	v2 = MustParse("1.2.3")
+	v3 = MustParse("1.2.4")
+)
+
+func testEQ(f comparator) bool {
+	return f(v1, v1) && !f(v1, v2)
+}
+
+func testNE(f comparator) bool {
+	return !f(v1, v1) && f(v1, v2)
+}
+
+func testGT(f comparator) bool {
+	return f(v2, v1) && f(v3, v2) && !f(v1, v2) && !f(v1, v1)
+}
+
+func testGE(f comparator) bool {
+	return f(v2, v1) && f(v3, v2) && !f(v1, v2)
+}
+
+func testLT(f comparator) bool {
+	return f(v1, v2) && f(v2, v3) && !f(v2, v1) && !f(v1, v1)
+}
+
+func testLE(f comparator) bool {
+	return f(v1, v2) && f(v2, v3) && !f(v2, v1)
+}
+
+func TestSplitAndTrim(t *testing.T) {
+	tests := []struct {
+		i string
+		s []string
+	}{
+		{"1.2.3 1.2.3", []string{"1.2.3", "1.2.3"}},
+		{"     1.2.3     1.2.3     ", []string{"1.2.3", "1.2.3"}},       // Spaces
+		{"  >=   1.2.3   <=  1.2.3   ", []string{">=1.2.3", "<=1.2.3"}}, // Spaces between operator and version
+		{"1.2.3 || >=1.2.3 <1.2.3", []string{"1.2.3", "||", ">=1.2.3", "<1.2.3"}},
+		{"      1.2.3      ||     >=1.2.3     <1.2.3    ", []string{"1.2.3", "||", ">=1.2.3", "<1.2.3"}},
+	}
+
+	for _, tc := range tests {
+		p := splitAndTrim(tc.i)
+		if !reflect.DeepEqual(p, tc.s) {
+			t.Errorf("Invalid for case %q: Expected %q, got: %q", tc.i, tc.s, p)
+		}
+	}
+}
+
+func TestSplitComparatorVersion(t *testing.T) {
+	tests := []struct {
+		i string
+		p []string
+	}{
+		{">1.2.3", []string{">", "1.2.3"}},
+		{">=1.2.3", []string{">=", "1.2.3"}},
+		{"<1.2.3", []string{"<", "1.2.3"}},
+		{"<=1.2.3", []string{"<=", "1.2.3"}},
+		{"1.2.3", []string{"", "1.2.3"}},
+		{"=1.2.3", []string{"=", "1.2.3"}},
+		{"==1.2.3", []string{"==", "1.2.3"}},
+		{"!=1.2.3", []string{"!=", "1.2.3"}},
+		{"!1.2.3", []string{"!", "1.2.3"}},
+		{"error", nil},
+	}
+	for _, tc := range tests {
+		if op, v, err := splitComparatorVersion(tc.i); err != nil {
+			if tc.p != nil {
+				t.Errorf("Invalid for case %q: Expected %q, got error %q", tc.i, tc.p, err)
+			}
+		} else if op != tc.p[0] {
+			t.Errorf("Invalid operator for case %q: Expected %q, got: %q", tc.i, tc.p[0], op)
+		} else if v != tc.p[1] {
+			t.Errorf("Invalid version for case %q: Expected %q, got: %q", tc.i, tc.p[1], v)
+		}
+
+	}
+}
+
+func TestBuildVersionRange(t *testing.T) {
+	tests := []struct {
+		opStr string
+		vStr  string
+		c     func(comparator) bool
+		v     string
+	}{
+		{">", "1.2.3", testGT, "1.2.3"},
+		{">=", "1.2.3", testGE, "1.2.3"},
+		{"<", "1.2.3", testLT, "1.2.3"},
+		{"<=", "1.2.3", testLE, "1.2.3"},
+		{"", "1.2.3", testEQ, "1.2.3"},
+		{"=", "1.2.3", testEQ, "1.2.3"},
+		{"==", "1.2.3", testEQ, "1.2.3"},
+		{"!=", "1.2.3", testNE, "1.2.3"},
+		{"!", "1.2.3", testNE, "1.2.3"},
+		{">>", "1.2.3", nil, ""},  // Invalid comparator
+		{"=", "invalid", nil, ""}, // Invalid version
+	}
+
+	for _, tc := range tests {
+		if r, err := buildVersionRange(tc.opStr, tc.vStr); err != nil {
+			if tc.c != nil {
+				t.Errorf("Invalid for case %q: Expected %q, got error %q", strings.Join([]string{tc.opStr, tc.vStr}, ""), tc.v, err)
+			}
+		} else if r == nil {
+			t.Errorf("Invalid for case %q: got nil", strings.Join([]string{tc.opStr, tc.vStr}, ""))
+		} else {
+			// test version
+			if tv := MustParse(tc.v); !r.v.EQ(tv) {
+				t.Errorf("Invalid for case %q: Expected version %q, got: %q", strings.Join([]string{tc.opStr, tc.vStr}, ""), tv, r.v)
+			}
+			// test comparator
+			if r.c == nil {
+				t.Errorf("Invalid for case %q: got nil comparator", strings.Join([]string{tc.opStr, tc.vStr}, ""))
+				continue
+			}
+			if !tc.c(r.c) {
+				t.Errorf("Invalid comparator for case %q\n", strings.Join([]string{tc.opStr, tc.vStr}, ""))
+			}
+		}
+	}
+
+}
+
+func TestSplitORParts(t *testing.T) {
+	tests := []struct {
+		i []string
+		o [][]string
+	}{
+		{[]string{">1.2.3", "||", "<1.2.3", "||", "=1.2.3"}, [][]string{
+			[]string{">1.2.3"},
+			[]string{"<1.2.3"},
+			[]string{"=1.2.3"},
+		}},
+		{[]string{">1.2.3", "<1.2.3", "||", "=1.2.3"}, [][]string{
+			[]string{">1.2.3", "<1.2.3"},
+			[]string{"=1.2.3"},
+		}},
+		{[]string{">1.2.3", "||"}, nil},
+		{[]string{"||", ">1.2.3"}, nil},
+	}
+	for _, tc := range tests {
+		o, err := splitORParts(tc.i)
+		if err != nil && tc.o != nil {
+			t.Errorf("Unexpected error for case %q: %s", tc.i, err)
+		}
+		if !reflect.DeepEqual(tc.o, o) {
+			t.Errorf("Invalid for case %q: Expected %q, got: %q", tc.i, tc.o, o)
+		}
+	}
+}
+
+func TestGetWildcardType(t *testing.T) {
+	wildcardTypeTests := []wildcardTypeTest{
+		{"x", majorWildcard},
+		{"1.x", minorWildcard},
+		{"1.2.x", patchWildcard},
+		{"fo.o.b.ar", noneWildcard},
+	}
+
+	for _, tc := range wildcardTypeTests {
+		o := getWildcardType(tc.input)
+		if o != tc.wildcardType {
+			t.Errorf("Invalid for case: %q: Expected %q, got: %q", tc.input, tc.wildcardType, o)
+		}
+	}
+}
+
+func TestCreateVersionFromWildcard(t *testing.T) {
+	tests := []struct {
+		i string
+		s string
+	}{
+		{"1.2.x", "1.2.0"},
+		{"1.x", "1.0.0"},
+	}
+
+	for _, tc := range tests {
+		p := createVersionFromWildcard(tc.i)
+		if p != tc.s {
+			t.Errorf("Invalid for case %q: Expected %q, got: %q", tc.i, tc.s, p)
+		}
+	}
+}
+
+func TestIncrementMajorVersion(t *testing.T) {
+	tests := []struct {
+		i string
+		s string
+	}{
+		{"1.2.3", "2.2.3"},
+		{"1.2", "2.2"},
+		{"foo.bar", ""},
+	}
+
+	for _, tc := range tests {
+		p, _ := incrementMajorVersion(tc.i)
+		if p != tc.s {
+			t.Errorf("Invalid for case %q: Expected %q, got: %q", tc.i, tc.s, p)
+		}
+	}
+}
+
+func TestIncrementMinorVersion(t *testing.T) {
+	tests := []struct {
+		i string
+		s string
+	}{
+		{"1.2.3", "1.3.3"},
+		{"1.2", "1.3"},
+		{"foo.bar", ""},
+	}
+
+	for _, tc := range tests {
+		p, _ := incrementMinorVersion(tc.i)
+		if p != tc.s {
+			t.Errorf("Invalid for case %q: Expected %q, got: %q", tc.i, tc.s, p)
+		}
+	}
+}
+
+func TestExpandWildcardVersion(t *testing.T) {
+	tests := []struct {
+		i [][]string
+		o [][]string
+	}{
+		{[][]string{[]string{"foox"}}, nil},
+		{[][]string{[]string{">=1.2.x"}}, [][]string{[]string{">=1.2.0"}}},
+		{[][]string{[]string{"<=1.2.x"}}, [][]string{[]string{"<1.3.0"}}},
+		{[][]string{[]string{">1.2.x"}}, [][]string{[]string{">=1.3.0"}}},
+		{[][]string{[]string{"<1.2.x"}}, [][]string{[]string{"<1.2.0"}}},
+		{[][]string{[]string{"!=1.2.x"}}, [][]string{[]string{"<1.2.0", ">=1.3.0"}}},
+		{[][]string{[]string{">=1.x"}}, [][]string{[]string{">=1.0.0"}}},
+		{[][]string{[]string{"<=1.x"}}, [][]string{[]string{"<2.0.0"}}},
+		{[][]string{[]string{">1.x"}}, [][]string{[]string{">=2.0.0"}}},
+		{[][]string{[]string{"<1.x"}}, [][]string{[]string{"<1.0.0"}}},
+		{[][]string{[]string{"!=1.x"}}, [][]string{[]string{"<1.0.0", ">=2.0.0"}}},
+		{[][]string{[]string{"1.2.x"}}, [][]string{[]string{">=1.2.0", "<1.3.0"}}},
+		{[][]string{[]string{"1.x"}}, [][]string{[]string{">=1.0.0", "<2.0.0"}}},
+	}
+
+	for _, tc := range tests {
+		o, _ := expandWildcardVersion(tc.i)
+		if !reflect.DeepEqual(tc.o, o) {
+			t.Errorf("Invalid for case %q: Expected %q, got: %q", tc.i, tc.o, o)
+		}
+	}
+}
+
+func TestVersionRangeToRange(t *testing.T) {
+	vr := versionRange{
+		v: MustParse("1.2.3"),
+		c: compLT,
+	}
+	rf := vr.rangeFunc()
+	if !rf(MustParse("1.2.2")) || rf(MustParse("1.2.3")) {
+		t.Errorf("Invalid conversion to range func")
+	}
+}
+
+func TestRangeAND(t *testing.T) {
+	v := MustParse("1.2.2")
+	v1 := MustParse("1.2.1")
+	v2 := MustParse("1.2.3")
+	rf1 := Range(func(v Version) bool {
+		return v.GT(v1)
+	})
+	rf2 := Range(func(v Version) bool {
+		return v.LT(v2)
+	})
+	rf := rf1.AND(rf2)
+	if rf(v1) {
+		t.Errorf("Invalid rangefunc, accepted: %s", v1)
+	}
+	if rf(v2) {
+		t.Errorf("Invalid rangefunc, accepted: %s", v2)
+	}
+	if !rf(v) {
+		t.Errorf("Invalid rangefunc, did not accept: %s", v)
+	}
+}
+
+func TestRangeOR(t *testing.T) {
+	tests := []struct {
+		v Version
+		b bool
+	}{
+		{MustParse("1.2.0"), true},
+		{MustParse("1.2.2"), false},
+		{MustParse("1.2.4"), true},
+	}
+	v1 := MustParse("1.2.1")
+	v2 := MustParse("1.2.3")
+	rf1 := Range(func(v Version) bool {
+		return v.LT(v1)
+	})
+	rf2 := Range(func(v Version) bool {
+		return v.GT(v2)
+	})
+	rf := rf1.OR(rf2)
+	for _, tc := range tests {
+		if r := rf(tc.v); r != tc.b {
+			t.Errorf("Invalid for case %q: Expected %t, got %t", tc.v, tc.b, r)
+		}
+	}
+}
+
+func TestParseRange(t *testing.T) {
+	type tv struct {
+		v string
+		b bool
+	}
+	tests := []struct {
+		i string
+		t []tv
+	}{
+		// Simple expressions
+		{">1.2.3", []tv{
+			{"1.2.2", false},
+			{"1.2.3", false},
+			{"1.2.4", true},
+		}},
+		{">=1.2.3", []tv{
+			{"1.2.3", true},
+			{"1.2.4", true},
+			{"1.2.2", false},
+		}},
+		{"<1.2.3", []tv{
+			{"1.2.2", true},
+			{"1.2.3", false},
+			{"1.2.4", false},
+		}},
+		{"<=1.2.3", []tv{
+			{"1.2.2", true},
+			{"1.2.3", true},
+			{"1.2.4", false},
+		}},
+		{"1.2.3", []tv{
+			{"1.2.2", false},
+			{"1.2.3", true},
+			{"1.2.4", false},
+		}},
+		{"=1.2.3", []tv{
+			{"1.2.2", false},
+			{"1.2.3", true},
+			{"1.2.4", false},
+		}},
+		{"==1.2.3", []tv{
+			{"1.2.2", false},
+			{"1.2.3", true},
+			{"1.2.4", false},
+		}},
+		{"!=1.2.3", []tv{
+			{"1.2.2", true},
+			{"1.2.3", false},
+			{"1.2.4", true},
+		}},
+		{"!1.2.3", []tv{
+			{"1.2.2", true},
+			{"1.2.3", false},
+			{"1.2.4", true},
+		}},
+		// Simple Expression errors
+		{">>1.2.3", nil},
+		{"!1.2.3", nil},
+		{"1.0", nil},
+		{"string", nil},
+		{"", nil},
+		{"fo.ob.ar.x", nil},
+		// AND Expressions
+		{">1.2.2 <1.2.4", []tv{
+			{"1.2.2", false},
+			{"1.2.3", true},
+			{"1.2.4", false},
+		}},
+		{"<1.2.2 <1.2.4", []tv{
+			{"1.2.1", true},
+			{"1.2.2", false},
+			{"1.2.3", false},
+			{"1.2.4", false},
+		}},
+		{">1.2.2 <1.2.5 !=1.2.4", []tv{
+			{"1.2.2", false},
+			{"1.2.3", true},
+			{"1.2.4", false},
+			{"1.2.5", false},
+		}},
+		{">1.2.2 <1.2.5 !1.2.4", []tv{
+			{"1.2.2", false},
+			{"1.2.3", true},
+			{"1.2.4", false},
+			{"1.2.5", false},
+		}},
+		// OR Expressions
+		{">1.2.2 || <1.2.4", []tv{
+			{"1.2.2", true},
+			{"1.2.3", true},
+			{"1.2.4", true},
+		}},
+		{"<1.2.2 || >1.2.4", []tv{
+			{"1.2.2", false},
+			{"1.2.3", false},
+			{"1.2.4", false},
+		}},
+		// Wildcard expressions
+		{">1.x", []tv{
+			{"0.1.9", false},
+			{"1.2.6", false},
+			{"1.9.0", false},
+			{"2.0.0", true},
+		}},
+		{">1.2.x", []tv{
+			{"1.1.9", false},
+			{"1.2.6", false},
+			{"1.3.0", true},
+		}},
+		// Combined Expressions
+		{">1.2.2 <1.2.4 || >=2.0.0", []tv{
+			{"1.2.2", false},
+			{"1.2.3", true},
+			{"1.2.4", false},
+			{"2.0.0", true},
+			{"2.0.1", true},
+		}},
+		{"1.x || >=2.0.x <2.2.x", []tv{
+			{"0.9.2", false},
+			{"1.2.2", true},
+			{"2.0.0", true},
+			{"2.1.8", true},
+			{"2.2.0", false},
+		}},
+		{">1.2.2 <1.2.4 || >=2.0.0 <3.0.0", []tv{
+			{"1.2.2", false},
+			{"1.2.3", true},
+			{"1.2.4", false},
+			{"2.0.0", true},
+			{"2.0.1", true},
+			{"2.9.9", true},
+			{"3.0.0", false},
+		}},
+	}
+
+	for _, tc := range tests {
+		r, err := ParseRange(tc.i)
+		if err != nil && tc.t != nil {
+			t.Errorf("Error parsing range %q: %s", tc.i, err)
+			continue
+		}
+		for _, tvc := range tc.t {
+			v := MustParse(tvc.v)
+			if res := r(v); res != tvc.b {
+				t.Errorf("Invalid for case %q matching %q: Expected %t, got: %t", tc.i, tvc.v, tvc.b, res)
+			}
+		}
+
+	}
+}
+
+func TestMustParseRange(t *testing.T) {
+	testCase := ">1.2.2 <1.2.4 || >=2.0.0 <3.0.0"
+	r := MustParseRange(testCase)
+	if !r(MustParse("1.2.3")) {
+		t.Errorf("Unexpected range behavior on MustParseRange")
+	}
+}
+
+func TestMustParseRange_panic(t *testing.T) {
+	defer func() {
+		if recover() == nil {
+			t.Errorf("Should have panicked")
+		}
+	}()
+	_ = MustParseRange("invalid version")
+}
+
+func BenchmarkRangeParseSimple(b *testing.B) {
+	const VERSION = ">1.0.0"
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		ParseRange(VERSION)
+	}
+}
+
+func BenchmarkRangeParseAverage(b *testing.B) {
+	const VERSION = ">=1.0.0 <2.0.0"
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		ParseRange(VERSION)
+	}
+}
+
+func BenchmarkRangeParseComplex(b *testing.B) {
+	const VERSION = ">=1.0.0 <2.0.0 || >=3.0.1 <4.0.0 !=3.0.3 || >=5.0.0"
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		ParseRange(VERSION)
+	}
+}
+
+func BenchmarkRangeMatchSimple(b *testing.B) {
+	const VERSION = ">1.0.0"
+	r, _ := ParseRange(VERSION)
+	v := MustParse("2.0.0")
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		r(v)
+	}
+}
+
+func BenchmarkRangeMatchAverage(b *testing.B) {
+	const VERSION = ">=1.0.0 <2.0.0"
+	r, _ := ParseRange(VERSION)
+	v := MustParse("1.2.3")
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		r(v)
+	}
+}
+
+func BenchmarkRangeMatchComplex(b *testing.B) {
+	const VERSION = ">=1.0.0 <2.0.0 || >=3.0.1 <4.0.0 !=3.0.3 || >=5.0.0"
+	r, _ := ParseRange(VERSION)
+	v := MustParse("5.0.1")
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		r(v)
+	}
+}
diff --git a/src/vendor/github.com/blang/semver/semver.go b/src/vendor/github.com/blang/semver/semver.go
new file mode 100644
index 000000000..8ee0842e6
--- /dev/null
+++ b/src/vendor/github.com/blang/semver/semver.go
@@ -0,0 +1,418 @@
+package semver
+
+import (
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+const (
+	numbers  string = "0123456789"
+	alphas          = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-"
+	alphanum        = alphas + numbers
+)
+
+// SpecVersion is the latest fully supported spec version of semver
+var SpecVersion = Version{
+	Major: 2,
+	Minor: 0,
+	Patch: 0,
+}
+
+// Version represents a semver compatible version
+type Version struct {
+	Major uint64
+	Minor uint64
+	Patch uint64
+	Pre   []PRVersion
+	Build []string //No Precendence
+}
+
+// Version to string
+func (v Version) String() string {
+	b := make([]byte, 0, 5)
+	b = strconv.AppendUint(b, v.Major, 10)
+	b = append(b, '.')
+	b = strconv.AppendUint(b, v.Minor, 10)
+	b = append(b, '.')
+	b = strconv.AppendUint(b, v.Patch, 10)
+
+	if len(v.Pre) > 0 {
+		b = append(b, '-')
+		b = append(b, v.Pre[0].String()...)
+
+		for _, pre := range v.Pre[1:] {
+			b = append(b, '.')
+			b = append(b, pre.String()...)
+		}
+	}
+
+	if len(v.Build) > 0 {
+		b = append(b, '+')
+		b = append(b, v.Build[0]...)
+
+		for _, build := range v.Build[1:] {
+			b = append(b, '.')
+			b = append(b, build...)
+		}
+	}
+
+	return string(b)
+}
+
+// Equals checks if v is equal to o.
+func (v Version) Equals(o Version) bool {
+	return (v.Compare(o) == 0)
+}
+
+// EQ checks if v is equal to o.
+func (v Version) EQ(o Version) bool {
+	return (v.Compare(o) == 0)
+}
+
+// NE checks if v is not equal to o.
+func (v Version) NE(o Version) bool {
+	return (v.Compare(o) != 0)
+}
+
+// GT checks if v is greater than o.
+func (v Version) GT(o Version) bool {
+	return (v.Compare(o) == 1)
+}
+
+// GTE checks if v is greater than or equal to o.
+func (v Version) GTE(o Version) bool {
+	return (v.Compare(o) >= 0)
+}
+
+// GE checks if v is greater than or equal to o.
+func (v Version) GE(o Version) bool {
+	return (v.Compare(o) >= 0)
+}
+
+// LT checks if v is less than o.
+func (v Version) LT(o Version) bool {
+	return (v.Compare(o) == -1)
+}
+
+// LTE checks if v is less than or equal to o.
+func (v Version) LTE(o Version) bool {
+	return (v.Compare(o) <= 0)
+}
+
+// LE checks if v is less than or equal to o.
+func (v Version) LE(o Version) bool {
+	return (v.Compare(o) <= 0)
+}
+
+// Compare compares Versions v to o:
+// -1 == v is less than o
+// 0 == v is equal to o
+// 1 == v is greater than o
+func (v Version) Compare(o Version) int {
+	if v.Major != o.Major {
+		if v.Major > o.Major {
+			return 1
+		}
+		return -1
+	}
+	if v.Minor != o.Minor {
+		if v.Minor > o.Minor {
+			return 1
+		}
+		return -1
+	}
+	if v.Patch != o.Patch {
+		if v.Patch > o.Patch {
+			return 1
+		}
+		return -1
+	}
+
+	// Quick comparison if a version has no prerelease versions
+	if len(v.Pre) == 0 && len(o.Pre) == 0 {
+		return 0
+	} else if len(v.Pre) == 0 && len(o.Pre) > 0 {
+		return 1
+	} else if len(v.Pre) > 0 && len(o.Pre) == 0 {
+		return -1
+	}
+
+	i := 0
+	for ; i < len(v.Pre) && i < len(o.Pre); i++ {
+		if comp := v.Pre[i].Compare(o.Pre[i]); comp == 0 {
+			continue
+		} else if comp == 1 {
+			return 1
+		} else {
+			return -1
+		}
+	}
+
+	// If all pr versions are the equal but one has further prversion, this one greater
+	if i == len(v.Pre) && i == len(o.Pre) {
+		return 0
+	} else if i == len(v.Pre) && i < len(o.Pre) {
+		return -1
+	} else {
+		return 1
+	}
+
+}
+
+// Validate validates v and returns error in case
+func (v Version) Validate() error {
+	// Major, Minor, Patch already validated using uint64
+
+	for _, pre := range v.Pre {
+		if !pre.IsNum { //Numeric prerelease versions already uint64
+			if len(pre.VersionStr) == 0 {
+				return fmt.Errorf("Prerelease can not be empty %q", pre.VersionStr)
+			}
+			if !containsOnly(pre.VersionStr, alphanum) {
+				return fmt.Errorf("Invalid character(s) found in prerelease %q", pre.VersionStr)
+			}
+		}
+	}
+
+	for _, build := range v.Build {
+		if len(build) == 0 {
+			return fmt.Errorf("Build meta data can not be empty %q", build)
+		}
+		if !containsOnly(build, alphanum) {
+			return fmt.Errorf("Invalid character(s) found in build meta data %q", build)
+		}
+	}
+
+	return nil
+}
+
+// New is an alias for Parse and returns a pointer, parses version string and returns a validated Version or error
+func New(s string) (vp *Version, err error) {
+	v, err := Parse(s)
+	vp = &v
+	return
+}
+
+// Make is an alias for Parse, parses version string and returns a validated Version or error
+func Make(s string) (Version, error) {
+	return Parse(s)
+}
+
+// ParseTolerant allows for certain version specifications that do not strictly adhere to semver
+// specs to be parsed by this library. It does so by normalizing versions before passing them to
+// Parse(). It currently trims spaces, removes a "v" prefix, and adds a 0 patch number to versions
+// with only major and minor components specified
+func ParseTolerant(s string) (Version, error) {
+	s = strings.TrimSpace(s)
+	s = strings.TrimPrefix(s, "v")
+
+	// Split into major.minor.(patch+pr+meta)
+	parts := strings.SplitN(s, ".", 3)
+	if len(parts) < 3 {
+		if strings.ContainsAny(parts[len(parts)-1], "+-") {
+			return Version{}, errors.New("Short version cannot contain PreRelease/Build meta data")
+		}
+		for len(parts) < 3 {
+			parts = append(parts, "0")
+		}
+		s = strings.Join(parts, ".")
+	}
+
+	return Parse(s)
+}
+
+// Parse parses version string and returns a validated Version or error
+func Parse(s string) (Version, error) {
+	if len(s) == 0 {
+		return Version{}, errors.New("Version string empty")
+	}
+
+	// Split into major.minor.(patch+pr+meta)
+	parts := strings.SplitN(s, ".", 3)
+	if len(parts) != 3 {
+		return Version{}, errors.New("No Major.Minor.Patch elements found")
+	}
+
+	// Major
+	if !containsOnly(parts[0], numbers) {
+		return Version{}, fmt.Errorf("Invalid character(s) found in major number %q", parts[0])
+	}
+	if hasLeadingZeroes(parts[0]) {
+		return Version{}, fmt.Errorf("Major number must not contain leading zeroes %q", parts[0])
+	}
+	major, err := strconv.ParseUint(parts[0], 10, 64)
+	if err != nil {
+		return Version{}, err
+	}
+
+	// Minor
+	if !containsOnly(parts[1], numbers) {
+		return Version{}, fmt.Errorf("Invalid character(s) found in minor number %q", parts[1])
+	}
+	if hasLeadingZeroes(parts[1]) {
+		return Version{}, fmt.Errorf("Minor number must not contain leading zeroes %q", parts[1])
+	}
+	minor, err := strconv.ParseUint(parts[1], 10, 64)
+	if err != nil {
+		return Version{}, err
+	}
+
+	v := Version{}
+	v.Major = major
+	v.Minor = minor
+
+	var build, prerelease []string
+	patchStr := parts[2]
+
+	if buildIndex := strings.IndexRune(patchStr, '+'); buildIndex != -1 {
+		build = strings.Split(patchStr[buildIndex+1:], ".")
+		patchStr = patchStr[:buildIndex]
+	}
+
+	if preIndex := strings.IndexRune(patchStr, '-'); preIndex != -1 {
+		prerelease = strings.Split(patchStr[preIndex+1:], ".")
+		patchStr = patchStr[:preIndex]
+	}
+
+	if !containsOnly(patchStr, numbers) {
+		return Version{}, fmt.Errorf("Invalid character(s) found in patch number %q", patchStr)
+	}
+	if hasLeadingZeroes(patchStr) {
+		return Version{}, fmt.Errorf("Patch number must not contain leading zeroes %q", patchStr)
+	}
+	patch, err := strconv.ParseUint(patchStr, 10, 64)
+	if err != nil {
+		return Version{}, err
+	}
+
+	v.Patch = patch
+
+	// Prerelease
+	for _, prstr := range prerelease {
+		parsedPR, err := NewPRVersion(prstr)
+		if err != nil {
+			return Version{}, err
+		}
+		v.Pre = append(v.Pre, parsedPR)
+	}
+
+	// Build meta data
+	for _, str := range build {
+		if len(str) == 0 {
+			return Version{}, errors.New("Build meta data is empty")
+		}
+		if !containsOnly(str, alphanum) {
+			return Version{}, fmt.Errorf("Invalid character(s) found in build meta data %q", str)
+		}
+		v.Build = append(v.Build, str)
+	}
+
+	return v, nil
+}
+
+// MustParse is like Parse but panics if the version cannot be parsed.
+func MustParse(s string) Version {
+	v, err := Parse(s)
+	if err != nil {
+		panic(`semver: Parse(` + s + `): ` + err.Error())
+	}
+	return v
+}
+
+// PRVersion represents a PreRelease Version
+type PRVersion struct {
+	VersionStr string
+	VersionNum uint64
+	IsNum      bool
+}
+
+// NewPRVersion creates a new valid prerelease version
+func NewPRVersion(s string) (PRVersion, error) {
+	if len(s) == 0 {
+		return PRVersion{}, errors.New("Prerelease is empty")
+	}
+	v := PRVersion{}
+	if containsOnly(s, numbers) {
+		if hasLeadingZeroes(s) {
+			return PRVersion{}, fmt.Errorf("Numeric PreRelease version must not contain leading zeroes %q", s)
+		}
+		num, err := strconv.ParseUint(s, 10, 64)
+
+		// Might never be hit, but just in case
+		if err != nil {
+			return PRVersion{}, err
+		}
+		v.VersionNum = num
+		v.IsNum = true
+	} else if containsOnly(s, alphanum) {
+		v.VersionStr = s
+		v.IsNum = false
+	} else {
+		return PRVersion{}, fmt.Errorf("Invalid character(s) found in prerelease %q", s)
+	}
+	return v, nil
+}
+
+// IsNumeric checks if prerelease-version is numeric
+func (v PRVersion) IsNumeric() bool {
+	return v.IsNum
+}
+
+// Compare compares two PreRelease Versions v and o:
+// -1 == v is less than o
+// 0 == v is equal to o
+// 1 == v is greater than o
+func (v PRVersion) Compare(o PRVersion) int {
+	if v.IsNum && !o.IsNum {
+		return -1
+	} else if !v.IsNum && o.IsNum {
+		return 1
+	} else if v.IsNum && o.IsNum {
+		if v.VersionNum == o.VersionNum {
+			return 0
+		} else if v.VersionNum > o.VersionNum {
+			return 1
+		} else {
+			return -1
+		}
+	} else { // both are Alphas
+		if v.VersionStr == o.VersionStr {
+			return 0
+		} else if v.VersionStr > o.VersionStr {
+			return 1
+		} else {
+			return -1
+		}
+	}
+}
+
+// PreRelease version to string
+func (v PRVersion) String() string {
+	if v.IsNum {
+		return strconv.FormatUint(v.VersionNum, 10)
+	}
+	return v.VersionStr
+}
+
+func containsOnly(s string, set string) bool {
+	return strings.IndexFunc(s, func(r rune) bool {
+		return !strings.ContainsRune(set, r)
+	}) == -1
+}
+
+func hasLeadingZeroes(s string) bool {
+	return len(s) > 1 && s[0] == '0'
+}
+
+// NewBuildVersion creates a new valid build version
+func NewBuildVersion(s string) (string, error) {
+	if len(s) == 0 {
+		return "", errors.New("Buildversion is empty")
+	}
+	if !containsOnly(s, alphanum) {
+		return "", fmt.Errorf("Invalid character(s) found in build meta data %q", s)
+	}
+	return s, nil
+}
diff --git a/src/vendor/github.com/blang/semver/semver_test.go b/src/vendor/github.com/blang/semver/semver_test.go
new file mode 100644
index 000000000..b3e1fd43c
--- /dev/null
+++ b/src/vendor/github.com/blang/semver/semver_test.go
@@ -0,0 +1,458 @@
+package semver
+
+import (
+	"testing"
+)
+
+func prstr(s string) PRVersion {
+	return PRVersion{s, 0, false}
+}
+
+func prnum(i uint64) PRVersion {
+	return PRVersion{"", i, true}
+}
+
+type formatTest struct {
+	v      Version
+	result string
+}
+
+var formatTests = []formatTest{
+	{Version{1, 2, 3, nil, nil}, "1.2.3"},
+	{Version{0, 0, 1, nil, nil}, "0.0.1"},
+	{Version{0, 0, 1, []PRVersion{prstr("alpha"), prstr("preview")}, []string{"123", "456"}}, "0.0.1-alpha.preview+123.456"},
+	{Version{1, 2, 3, []PRVersion{prstr("alpha"), prnum(1)}, []string{"123", "456"}}, "1.2.3-alpha.1+123.456"},
+	{Version{1, 2, 3, []PRVersion{prstr("alpha"), prnum(1)}, nil}, "1.2.3-alpha.1"},
+	{Version{1, 2, 3, nil, []string{"123", "456"}}, "1.2.3+123.456"},
+	// Prereleases and build metadata hyphens
+	{Version{1, 2, 3, []PRVersion{prstr("alpha"), prstr("b-eta")}, []string{"123", "b-uild"}}, "1.2.3-alpha.b-eta+123.b-uild"},
+	{Version{1, 2, 3, nil, []string{"123", "b-uild"}}, "1.2.3+123.b-uild"},
+	{Version{1, 2, 3, []PRVersion{prstr("alpha"), prstr("b-eta")}, nil}, "1.2.3-alpha.b-eta"},
+}
+
+var tolerantFormatTests = []formatTest{
+	{Version{1, 2, 3, nil, nil}, "v1.2.3"},
+	{Version{1, 2, 3, nil, nil}, "	1.2.3 "},
+	{Version{1, 2, 0, nil, nil}, "1.2"},
+	{Version{1, 0, 0, nil, nil}, "1"},
+}
+
+func TestStringer(t *testing.T) {
+	for _, test := range formatTests {
+		if res := test.v.String(); res != test.result {
+			t.Errorf("Stringer, expected %q but got %q", test.result, res)
+		}
+	}
+}
+
+func TestParse(t *testing.T) {
+	for _, test := range formatTests {
+		if v, err := Parse(test.result); err != nil {
+			t.Errorf("Error parsing %q: %q", test.result, err)
+		} else if comp := v.Compare(test.v); comp != 0 {
+			t.Errorf("Parsing, expected %q but got %q, comp: %d ", test.v, v, comp)
+		} else if err := v.Validate(); err != nil {
+			t.Errorf("Error validating parsed version %q: %q", test.v, err)
+		}
+	}
+}
+
+func TestParseTolerant(t *testing.T) {
+	for _, test := range tolerantFormatTests {
+		if v, err := ParseTolerant(test.result); err != nil {
+			t.Errorf("Error parsing %q: %q", test.result, err)
+		} else if comp := v.Compare(test.v); comp != 0 {
+			t.Errorf("Parsing, expected %q but got %q, comp: %d ", test.v, v, comp)
+		} else if err := v.Validate(); err != nil {
+			t.Errorf("Error validating parsed version %q: %q", test.v, err)
+		}
+	}
+}
+
+func TestMustParse(t *testing.T) {
+	_ = MustParse("32.2.1-alpha")
+}
+
+func TestMustParse_panic(t *testing.T) {
+	defer func() {
+		if recover() == nil {
+			t.Errorf("Should have panicked")
+		}
+	}()
+	_ = MustParse("invalid version")
+}
+
+func TestValidate(t *testing.T) {
+	for _, test := range formatTests {
+		if err := test.v.Validate(); err != nil {
+			t.Errorf("Error validating %q: %q", test.v, err)
+		}
+	}
+}
+
+type compareTest struct {
+	v1     Version
+	v2     Version
+	result int
+}
+
+var compareTests = []compareTest{
+	{Version{1, 0, 0, nil, nil}, Version{1, 0, 0, nil, nil}, 0},
+	{Version{2, 0, 0, nil, nil}, Version{1, 0, 0, nil, nil}, 1},
+	{Version{0, 1, 0, nil, nil}, Version{0, 1, 0, nil, nil}, 0},
+	{Version{0, 2, 0, nil, nil}, Version{0, 1, 0, nil, nil}, 1},
+	{Version{0, 0, 1, nil, nil}, Version{0, 0, 1, nil, nil}, 0},
+	{Version{0, 0, 2, nil, nil}, Version{0, 0, 1, nil, nil}, 1},
+	{Version{1, 2, 3, nil, nil}, Version{1, 2, 3, nil, nil}, 0},
+	{Version{2, 2, 4, nil, nil}, Version{1, 2, 4, nil, nil}, 1},
+	{Version{1, 3, 3, nil, nil}, Version{1, 2, 3, nil, nil}, 1},
+	{Version{1, 2, 4, nil, nil}, Version{1, 2, 3, nil, nil}, 1},
+
+	// Spec Examples #11
+	{Version{1, 0, 0, nil, nil}, Version{2, 0, 0, nil, nil}, -1},
+	{Version{2, 0, 0, nil, nil}, Version{2, 1, 0, nil, nil}, -1},
+	{Version{2, 1, 0, nil, nil}, Version{2, 1, 1, nil, nil}, -1},
+
+	// Spec Examples #9
+	{Version{1, 0, 0, nil, nil}, Version{1, 0, 0, []PRVersion{prstr("alpha")}, nil}, 1},
+	{Version{1, 0, 0, []PRVersion{prstr("alpha")}, nil}, Version{1, 0, 0, []PRVersion{prstr("alpha"), prnum(1)}, nil}, -1},
+	{Version{1, 0, 0, []PRVersion{prstr("alpha"), prnum(1)}, nil}, Version{1, 0, 0, []PRVersion{prstr("alpha"), prstr("beta")}, nil}, -1},
+	{Version{1, 0, 0, []PRVersion{prstr("alpha"), prstr("beta")}, nil}, Version{1, 0, 0, []PRVersion{prstr("beta")}, nil}, -1},
+	{Version{1, 0, 0, []PRVersion{prstr("beta")}, nil}, Version{1, 0, 0, []PRVersion{prstr("beta"), prnum(2)}, nil}, -1},
+	{Version{1, 0, 0, []PRVersion{prstr("beta"), prnum(2)}, nil}, Version{1, 0, 0, []PRVersion{prstr("beta"), prnum(11)}, nil}, -1},
+	{Version{1, 0, 0, []PRVersion{prstr("beta"), prnum(11)}, nil}, Version{1, 0, 0, []PRVersion{prstr("rc"), prnum(1)}, nil}, -1},
+	{Version{1, 0, 0, []PRVersion{prstr("rc"), prnum(1)}, nil}, Version{1, 0, 0, nil, nil}, -1},
+
+	// Ignore Build metadata
+	{Version{1, 0, 0, nil, []string{"1", "2", "3"}}, Version{1, 0, 0, nil, nil}, 0},
+}
+
+func TestCompare(t *testing.T) {
+	for _, test := range compareTests {
+		if res := test.v1.Compare(test.v2); res != test.result {
+			t.Errorf("Comparing %q : %q, expected %d but got %d", test.v1, test.v2, test.result, res)
+		}
+		//Test counterpart
+		if res := test.v2.Compare(test.v1); res != -test.result {
+			t.Errorf("Comparing %q : %q, expected %d but got %d", test.v2, test.v1, -test.result, res)
+		}
+	}
+}
+
+type wrongformatTest struct {
+	v   *Version
+	str string
+}
+
+var wrongformatTests = []wrongformatTest{
+	{nil, ""},
+	{nil, "."},
+	{nil, "1."},
+	{nil, ".1"},
+	{nil, "a.b.c"},
+	{nil, "1.a.b"},
+	{nil, "1.1.a"},
+	{nil, "1.a.1"},
+	{nil, "a.1.1"},
+	{nil, ".."},
+	{nil, "1.."},
+	{nil, "1.1."},
+	{nil, "1..1"},
+	{nil, "1.1.+123"},
+	{nil, "1.1.-beta"},
+	{nil, "-1.1.1"},
+	{nil, "1.-1.1"},
+	{nil, "1.1.-1"},
+	// giant numbers
+	{nil, "20000000000000000000.1.1"},
+	{nil, "1.20000000000000000000.1"},
+	{nil, "1.1.20000000000000000000"},
+	{nil, "1.1.1-20000000000000000000"},
+	// Leading zeroes
+	{nil, "01.1.1"},
+	{nil, "001.1.1"},
+	{nil, "1.01.1"},
+	{nil, "1.001.1"},
+	{nil, "1.1.01"},
+	{nil, "1.1.001"},
+	{nil, "1.1.1-01"},
+	{nil, "1.1.1-001"},
+	{nil, "1.1.1-beta.01"},
+	{nil, "1.1.1-beta.001"},
+	{&Version{0, 0, 0, []PRVersion{prstr("!")}, nil}, "0.0.0-!"},
+	{&Version{0, 0, 0, nil, []string{"!"}}, "0.0.0+!"},
+	// empty prversion
+	{&Version{0, 0, 0, []PRVersion{prstr(""), prstr("alpha")}, nil}, "0.0.0-.alpha"},
+	// empty build meta data
+	{&Version{0, 0, 0, []PRVersion{prstr("alpha")}, []string{""}}, "0.0.0-alpha+"},
+	{&Version{0, 0, 0, []PRVersion{prstr("alpha")}, []string{"test", ""}}, "0.0.0-alpha+test."},
+}
+
+func TestWrongFormat(t *testing.T) {
+	for _, test := range wrongformatTests {
+
+		if res, err := Parse(test.str); err == nil {
+			t.Errorf("Parsing wrong format version %q, expected error but got %q", test.str, res)
+		}
+
+		if test.v != nil {
+			if err := test.v.Validate(); err == nil {
+				t.Errorf("Validating wrong format version %q (%q), expected error", test.v, test.str)
+			}
+		}
+	}
+}
+
+var wrongTolerantFormatTests = []wrongformatTest{
+	{nil, "1.0+abc"},
+	{nil, "1.0-rc.1"},
+}
+
+func TestWrongTolerantFormat(t *testing.T) {
+	for _, test := range wrongTolerantFormatTests {
+		if res, err := ParseTolerant(test.str); err == nil {
+			t.Errorf("Parsing wrong format version %q, expected error but got %q", test.str, res)
+		}
+	}
+}
+
+func TestCompareHelper(t *testing.T) {
+	v := Version{1, 0, 0, []PRVersion{prstr("alpha")}, nil}
+	v1 := Version{1, 0, 0, nil, nil}
+	if !v.EQ(v) {
+		t.Errorf("%q should be equal to %q", v, v)
+	}
+	if !v.Equals(v) {
+		t.Errorf("%q should be equal to %q", v, v)
+	}
+	if !v1.NE(v) {
+		t.Errorf("%q should not be equal to %q", v1, v)
+	}
+	if !v.GTE(v) {
+		t.Errorf("%q should be greater than or equal to %q", v, v)
+	}
+	if !v.LTE(v) {
+		t.Errorf("%q should be less than or equal to %q", v, v)
+	}
+	if !v.LT(v1) {
+		t.Errorf("%q should be less than %q", v, v1)
+	}
+	if !v.LTE(v1) {
+		t.Errorf("%q should be less than or equal %q", v, v1)
+	}
+	if !v.LE(v1) {
+		t.Errorf("%q should be less than or equal %q", v, v1)
+	}
+	if !v1.GT(v) {
+		t.Errorf("%q should be greater than %q", v1, v)
+	}
+	if !v1.GTE(v) {
+		t.Errorf("%q should be greater than or equal %q", v1, v)
+	}
+	if !v1.GE(v) {
+		t.Errorf("%q should be greater than or equal %q", v1, v)
+	}
+}
+
+func TestPreReleaseVersions(t *testing.T) {
+	p1, err := NewPRVersion("123")
+	if !p1.IsNumeric() {
+		t.Errorf("Expected numeric prversion, got %q", p1)
+	}
+	if p1.VersionNum != 123 {
+		t.Error("Wrong prversion number")
+	}
+	if err != nil {
+		t.Errorf("Not expected error %q", err)
+	}
+	p2, err := NewPRVersion("alpha")
+	if p2.IsNumeric() {
+		t.Errorf("Expected non-numeric prversion, got %q", p2)
+	}
+	if p2.VersionStr != "alpha" {
+		t.Error("Wrong prversion string")
+	}
+	if err != nil {
+		t.Errorf("Not expected error %q", err)
+	}
+}
+
+func TestBuildMetaDataVersions(t *testing.T) {
+	_, err := NewBuildVersion("123")
+	if err != nil {
+		t.Errorf("Unexpected error %q", err)
+	}
+
+	_, err = NewBuildVersion("build")
+	if err != nil {
+		t.Errorf("Unexpected error %q", err)
+	}
+
+	_, err = NewBuildVersion("test?")
+	if err == nil {
+		t.Error("Expected error, got none")
+	}
+
+	_, err = NewBuildVersion("")
+	if err == nil {
+		t.Error("Expected error, got none")
+	}
+}
+
+func TestNewHelper(t *testing.T) {
+	v, err := New("1.2.3")
+	if err != nil {
+		t.Fatalf("Unexpected error %q", err)
+	}
+
+	// New returns pointer
+	if v == nil {
+		t.Fatal("Version is nil")
+	}
+	if v.Compare(Version{1, 2, 3, nil, nil}) != 0 {
+		t.Fatal("Unexpected comparison problem")
+	}
+}
+
+func TestMakeHelper(t *testing.T) {
+	v, err := Make("1.2.3")
+	if err != nil {
+		t.Fatalf("Unexpected error %q", err)
+	}
+	if v.Compare(Version{1, 2, 3, nil, nil}) != 0 {
+		t.Fatal("Unexpected comparison problem")
+	}
+}
+
+func BenchmarkParseSimple(b *testing.B) {
+	const VERSION = "0.0.1"
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		Parse(VERSION)
+	}
+}
+
+func BenchmarkParseComplex(b *testing.B) {
+	const VERSION = "0.0.1-alpha.preview+123.456"
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		Parse(VERSION)
+	}
+}
+
+func BenchmarkParseAverage(b *testing.B) {
+	l := len(formatTests)
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		Parse(formatTests[n%l].result)
+	}
+}
+
+func BenchmarkParseTolerantAverage(b *testing.B) {
+	l := len(tolerantFormatTests)
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		ParseTolerant(tolerantFormatTests[n%l].result)
+	}
+}
+
+func BenchmarkStringSimple(b *testing.B) {
+	const VERSION = "0.0.1"
+	v, _ := Parse(VERSION)
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		v.String()
+	}
+}
+
+func BenchmarkStringLarger(b *testing.B) {
+	const VERSION = "11.15.2012"
+	v, _ := Parse(VERSION)
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		v.String()
+	}
+}
+
+func BenchmarkStringComplex(b *testing.B) {
+	const VERSION = "0.0.1-alpha.preview+123.456"
+	v, _ := Parse(VERSION)
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		v.String()
+	}
+}
+
+func BenchmarkStringAverage(b *testing.B) {
+	l := len(formatTests)
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		formatTests[n%l].v.String()
+	}
+}
+
+func BenchmarkValidateSimple(b *testing.B) {
+	const VERSION = "0.0.1"
+	v, _ := Parse(VERSION)
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		v.Validate()
+	}
+}
+
+func BenchmarkValidateComplex(b *testing.B) {
+	const VERSION = "0.0.1-alpha.preview+123.456"
+	v, _ := Parse(VERSION)
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		v.Validate()
+	}
+}
+
+func BenchmarkValidateAverage(b *testing.B) {
+	l := len(formatTests)
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		formatTests[n%l].v.Validate()
+	}
+}
+
+func BenchmarkCompareSimple(b *testing.B) {
+	const VERSION = "0.0.1"
+	v, _ := Parse(VERSION)
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		v.Compare(v)
+	}
+}
+
+func BenchmarkCompareComplex(b *testing.B) {
+	const VERSION = "0.0.1-alpha.preview+123.456"
+	v, _ := Parse(VERSION)
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		v.Compare(v)
+	}
+}
+
+func BenchmarkCompareAverage(b *testing.B) {
+	l := len(compareTests)
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		compareTests[n%l].v1.Compare((compareTests[n%l].v2))
+	}
+}
diff --git a/src/vendor/github.com/blang/semver/sort.go b/src/vendor/github.com/blang/semver/sort.go
new file mode 100644
index 000000000..e18f88082
--- /dev/null
+++ b/src/vendor/github.com/blang/semver/sort.go
@@ -0,0 +1,28 @@
+package semver
+
+import (
+	"sort"
+)
+
+// Versions represents multiple versions.
+type Versions []Version
+
+// Len returns length of version collection
+func (s Versions) Len() int {
+	return len(s)
+}
+
+// Swap swaps two versions inside the collection by its indices
+func (s Versions) Swap(i, j int) {
+	s[i], s[j] = s[j], s[i]
+}
+
+// Less checks if version at index i is less than version at index j
+func (s Versions) Less(i, j int) bool {
+	return s[i].LT(s[j])
+}
+
+// Sort sorts a slice of versions
+func Sort(versions []Version) {
+	sort.Sort(Versions(versions))
+}
diff --git a/src/vendor/github.com/blang/semver/sort_test.go b/src/vendor/github.com/blang/semver/sort_test.go
new file mode 100644
index 000000000..68893972a
--- /dev/null
+++ b/src/vendor/github.com/blang/semver/sort_test.go
@@ -0,0 +1,30 @@
+package semver
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestSort(t *testing.T) {
+	v100, _ := Parse("1.0.0")
+	v010, _ := Parse("0.1.0")
+	v001, _ := Parse("0.0.1")
+	versions := []Version{v010, v100, v001}
+	Sort(versions)
+
+	correct := []Version{v001, v010, v100}
+	if !reflect.DeepEqual(versions, correct) {
+		t.Fatalf("Sort returned wrong order: %s", versions)
+	}
+}
+
+func BenchmarkSort(b *testing.B) {
+	v100, _ := Parse("1.0.0")
+	v010, _ := Parse("0.1.0")
+	v001, _ := Parse("0.0.1")
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		Sort([]Version{v010, v100, v001})
+	}
+}
diff --git a/src/vendor/github.com/blang/semver/sql.go b/src/vendor/github.com/blang/semver/sql.go
new file mode 100644
index 000000000..eb4d80266
--- /dev/null
+++ b/src/vendor/github.com/blang/semver/sql.go
@@ -0,0 +1,30 @@
+package semver
+
+import (
+	"database/sql/driver"
+	"fmt"
+)
+
+// Scan implements the database/sql.Scanner interface.
+func (v *Version) Scan(src interface{}) (err error) {
+	var str string
+	switch src := src.(type) {
+	case string:
+		str = src
+	case []byte:
+		str = string(src)
+	default:
+		return fmt.Errorf("Version.Scan: cannot convert %T to string.", src)
+	}
+
+	if t, err := Parse(str); err == nil {
+		*v = t
+	}
+
+	return
+}
+
+// Value implements the database/sql/driver.Valuer interface.
+func (v Version) Value() (driver.Value, error) {
+	return v.String(), nil
+}
diff --git a/src/vendor/github.com/blang/semver/sql_test.go b/src/vendor/github.com/blang/semver/sql_test.go
new file mode 100644
index 000000000..ebf48b584
--- /dev/null
+++ b/src/vendor/github.com/blang/semver/sql_test.go
@@ -0,0 +1,38 @@
+package semver
+
+import (
+	"testing"
+)
+
+type scanTest struct {
+	val         interface{}
+	shouldError bool
+	expected    string
+}
+
+var scanTests = []scanTest{
+	{"1.2.3", false, "1.2.3"},
+	{[]byte("1.2.3"), false, "1.2.3"},
+	{7, true, ""},
+	{7e4, true, ""},
+	{true, true, ""},
+}
+
+func TestScanString(t *testing.T) {
+	for _, tc := range scanTests {
+		s := &Version{}
+		err := s.Scan(tc.val)
+		if tc.shouldError {
+			if err == nil {
+				t.Fatalf("Scan did not return an error on %v (%T)", tc.val, tc.val)
+			}
+		} else {
+			if err != nil {
+				t.Fatalf("Scan returned an unexpected error: %s (%T) on %v (%T)", tc.val, tc.val, tc.val, tc.val)
+			}
+			if val, _ := s.Value(); val != tc.expected {
+				t.Errorf("Wrong Value returned, expected %q, got %q", tc.expected, val)
+			}
+		}
+	}
+}