Merge pull request #1480 from pandamicro/develop

Fixed #3673: Add swallow option to cc.Layer’s setTouchEnabled function
Issue: Refactoring cc.Node's nodeToParentTransform for better performance.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Iss3652_nodeToParentTransformForCanvas
Merge pull request #1482 from dingpinglv/Iss_RefactoringNode

Issue: Refactoring cc.Node's nodeToParentTransform for better performance.
issue #3690: Rewrite CCNS.js
Merge pull request #1484 from SmallAiTT/iss3690_ccns_dev

issue #3690: Rewrite CCNS.js
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into develop
Fixed #3689: Correction of split logic in CCLabelTTF