New assets for the skin
Added test to facilitate launching parts of the editor separately
Renamed ActorEntity to EngineEntity
Added an engine instance and a shape renderer to controller
GroupEditor: Added enteredgroupeidtion and endedgroupedition event
Some changes to make EditorUI work
Bug fix in ListCommand. forceCombine added to CompositeCommand
Added parent to Renderer Actor
Added EditorImageComponent and its processor
Added ModelActions to perform changes in groups edited in GroupEditor
Added tests for group commands
Added SceneEditor view
Added executable test for SceneEditor
Small bug fix
Comments addressed
Some renames
Removed forceCombine attribute from CompositeCommand
Merge pull request #459 from anserran/sceneeditor

Scene Editor view