[CCNode schedule:interval:] should not immediately invoke the method.
Rough global z-order implementation.
Fix for popGroup adding the group command to the wrong queue.
Add debug labels to render groups. Fixed the queue sorting block.
Adding CCNodeColor tests
Merge branch 'v3.0' into develop

Conflicts:
	cocos2d-ui-tests/tests/CCRendererTest.m
Fixing warnings, deprecations and minor cleanup.
Removing atlas nodes.
Merge branch 'develop' of github.com:cocos2d/cocos2d-iphone into develop
Merge branch 'globalz' into develop
Fixing a merge issue,