Issue #5600: Add cc.ProtectedNode to ccui and sync ccui.UIWidget
Merge branch 'develop-cocostudio' of https://github.com/VisualSJ/cocos2d-html5 into Issue5600_Cocostudio

Conflicts:
	extensions/ccui/base-classes/UIWidget.js
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Issue5600_Cocostudio
Fixed #5626: call setUpdateEnabled(false) in onExit function
Merge branch 'develop' of git://github.com/cocos2d/cocos2d-html5 into develop
Issue #5600: migrate ccui.Widget and ccui.Layout
Merge branch 'develop-cocostudio' of https://github.com/VisualSJ/cocos2d-html5 into Issue5600_Cocostudio
Improve some docs
Merge pull request #1945 from pandamicro/develop

Fixed #5626: call setUpdateEnabled(false) in onExit function
Issue #5600: Sync ccui.Widget to -x latest code
Merge branch 'Issue5600_Cocostudio' of http://github.com/dingpinglv/cocos2d-html5 into develop-cocostudio
Issue #5600: sync ccui.Widget, ccui.Button, ccui.CheckBox, ccui.ImageView, ccui.LoadingBar, ccui.RichText
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Issue5600_Cocostudio
Issue #5600: update ui
Merge branch 'Issue5600_Cocostudio' of http://github.com/dingpinglv/cocos2d-html5 into develop-cocostudio