fixed #2246 Fixed a bug of cc.ScrollView that position of cc.ScrollView is wrong when it's parent node moved
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Iss2246_FixBugForScrollView
Merge pull request #953 from dingpinglv/Iss2246_FixBugForScrollView

fixed #2246 Fixed a bug of cc.ScrollView that position of cc.ScrollView is wrong when it's parent node moved