issue #3945 Refactor setColor and setOpacity
Merge branch 'develop-3.0' of https://github.com/cocos2d/cocos2d-html5 into socket.io
issue #3945 Refactor setColor and getColor
Merge pull request #1596 from xingsenma/develop-3.0

issue #3945 Refactor setColor and setOpacity