Closed #4919: fixed a bug of ccui.Layout that its scaleX, scaleY value is wrong in draw function
Merge branch 'develop-3.0' of https://github.com/cocos2d/cocos2d-html5 into Iss4919_UIScrollView
Merge pull request #1796 from dingpinglv/Iss4919_UIScrollView

Closed #4919: fixed a bug of ccui.Layout that its scaleX, scaleY value is wrong in draw function