Feature #4221: Change constants style in ccui
Merge branch 'develop-3.0' of git://github.com/cocos2d/cocos2d-html5 into develop-3.0
Issue #4294: Refactor ccui.UIHelper to ccui.helper
Merge pull request #1663 from pandamicro/develop-3.0

Issue #4294: Refactor ccui.UIHelper to ccui.helper