Add the method isTall to CompatibleMaterial.

Core/src/main/java/com/songoda/core/compatibility/CompatibleMaterial.java

@@ -2158,6 +2158,22 @@ public enum CompatibleMaterial {
         return false;
     }
 
+    /**
+     * @return true if this material is two blocks tall
+     */
+    public boolean isTall() {
+        switch (this) {
+            case SUNFLOWER:
+            case LILAC:
+            case LARGE_FERN:
+            case ROSE_BUSH:
+            case PEONY:
+            case TALL_GRASS:
+                return true;
+        }
+        return false;
+    }
+
     /**
      * @return true if this is a block that has a growth state
      */