Merge pull request #2540 from dingpinglv/setTransform

Fixed: corrected a bug of spine that its skeletons position is incorrect when scaleX = -1, scaleY = 1
Merge pull request #2541 from dingpinglv/setTransform

Fixed: fixed a bug of cc.SpriteBatchNode.WebGLRenderCmd that its position is incorrect in cc.ControlButton
Fixed: Fixed a bug of cc.Layer's bake function, its position is incorrect when set position
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into setTransform