Added save and bin icons.
Changed the save icon
Improved the tweens panel
Fixed some bugs, typo and junk code. Also added some documentation.
Component loading has been separated from entity loading. This was needed to simplify engine initialization, which was starting to get messy
This is what application initialization looks like. gameLoader.setVariablesManager(variablesManager) has been deleted, which was pretty dirty & annoying.
Replacing EntitiesLoader by ComponentLoader where needed
Dead comment removed
MockEntitiesLoader updated
Tests updated
Merge pull request #425 from RotaruDan/TweenUI-improvements

Tween UI improvements
Transparent clear color in abstract widget test
Divided modifier into Grouper and Handles
Extracting draggin logic from group editor widget
Updated tests
Merge pull request #427 from anserran/dragimprov

Improvements in Drag and Drop
Merge pull request #442 from jtorrente/componentloader

Component loader