Issue #2416: PhysicsSprite CanvasRender
Merge pull request #22 from VisualSJ/Iss2416_RefactorRenderer

Issue #2416: PhysicsSprite CanvasRender
Issue #2416: ClippingNode CanvasRender
Merge pull request #23 from VisualSJ/Iss2416_RefactorRenderer

Issue #2416: ClippingNode CanvasRender
Issue #2416: correct a mistake of cc.Node.WebGLRenderCmd
Issue #2415: correct some mistakes of cc.Layer and cc.Node
Merge branch 'Iss2416_RefactorRenderer' of https://github.com/dingpinglv/cocos2d-html5 into Iss2416_RefactorRenderer
Merge remote-tracking branch 'david/Iss2416_RefactorRenderer' into Iss2416_RefactorRenderer