Merge remote-tracking branch 'origin/dev' into cj
UPDATE
Merge remote-tracking branch 'origin/dev' into cj
取消扁平的显示列表，由Render自己执行帧渲染
和DOM操作解耦
MovieClipRenderer自己执行帧的渲染
UPDATE
Merge pull request #13 from imcj/cj

合并cj