Fixed: corrected a bug of spine that its skeletons position is incorrect when scaleX = -1, scaleY = 1
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into setTransform
remove the unused codes
Merge pull request #2540 from dingpinglv/setTransform

Fixed: corrected a bug of spine that its skeletons position is incorrect when scaleX = -1, scaleY = 1