* Test coverage for Challenges Command
* Added CompleteChallengeCommand test class
* Added Utils test class
* Added ChallengesGUI test class
* Fix code smells from sonarcloud analysis
* Added .gitignore
* Added Travis CI config file
* WIP ChallengesManager Test class
* Added ChallengesManager test class
* Removed debug
* Removed code smells.
* Added ChallengesAddon test class.
* Added onDisbale test
* Added new TryToComplete test class - WIP
Covers inventory challenges.
* Added Island Challenge entity tests to TryToComplete test class
