Merge pull request #18 from VisualSJ/Iss2416_RefactorRenderer

Issue #2416: Skeleton renderCmd
Issue #2416: Fixed labelAtlas literal transparency and text initialization
Merge branch 'Iss2416_RefactorRenderer' of http://github.com/dingpinglv/cocos2d-html5 into Iss2416_RefactorRenderer