Merge pull request #10 from VisualSJ/Iss2416_RefactorRenderer

Issue #2416: refactor renderer
Merge pull request #11 from VisualSJ/Iss2416_RefactorRenderer

CCTMXLayer renderCmd
Issue #2416: Refactor cc.SpriteBatchNode's renderer
Issue #2416: refactor cc.SpriteBatchNode's renderer
Merge branch 'Iss2416_RefactorRenderer' of https://github.com/dingpinglv/cocos2d-html5 into Iss2416_RefactorRenderer
Issue #2416: refactor cc.ClippingNode's renderer
Fix a bug about LabelAtlas variable does not exist
Fix a bug about LabelAtlas variable does not exist
Merge branch 'Iss2416_RefactorRenderer' of http://github.com/dingpinglv/cocos2d-html5 into Iss2416_RefactorRenderer