Basic transitions
Updated scene control
Updated scene management
Merge branch 'Transition' of https://github.com/cocos2d/cocos2d-iphone into Transition
Basic transitions
Testbed skeleton
Testbed skeleton
Merge branch 'Transition' of https://github.com/cocos2d/cocos2d-iphone into develop-v3

Conflicts:
	cocos2d-osx.xcodeproj/project.pbxproj
Started cleaning up new transitions
Fixes bug in menu
Fixes issue in CCScheduler
Fixes memory leak
Fixes potential issue (found by analyzer)
Adds onExitTransitionDidStart and onEnterTransistionDid finish callbacks
Added tests for basic transitions