Merge pull request #1333 from pandamicro/develop

Refactor #3370 : Fixed a bug with viewport meta
Closed #3411: set cc.Rect's origin and size from public to private
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Iss3411_HideRectorigin
Merge pull request #1334 from dingpinglv/Iss3411_HideRectorigin

Closed #3411: set cc.Rect's origin and size from public to private
Merge pull request #8 from cocos2d/develop

Pull down