Sprite改为SWFSprite
改为基于tileImage
改为基于SWFSprite
添加SwfSprite
拖拽手势 拖拽区域bug修复
making sure 'mTextBounds' is not null when text field is restored after context loss
added support for rotated SubTextures
增加一个获取当前播放标签的方法
SwfMovieClip改为继承SwfSprite
集成一个遮罩类
Merge pull request #4 from zmLiu/master

合并lang的更新