Delete some compile output files.
Add resources and trouble shooting note.
Add first Scene: mainScene.
Modify class name to be standard naming rule.
Add level choose scene class and createScene() code.
complete createLvlLabel() function, which can create a level label.
level choose scene class is ready.
Add Position Editor Scene class.
Add 2 layers, GetBackLayer & PosEditorLayer, which belone to PosEditorScene.
Add getBack() function to the class
Add get back function for GetBackLayer class.
Make GetBackLayer visible at PosEditorScene.
Merge pull request #1 from ybdesire/develop

Develop branch merge to master