Refactor #4240: Refactor cc.configuration to fit -x api
Refactor #4003: Open getFontName, getFontSize API in extension
Small changes
Merge branch 'develop-3.0' of https://github.com/cocos2d/cocos2d-html5 into develop-3.0

Conflicts:
	extensions/cocostudio/gui/uiwidgets/UILabel.js
	extensions/cocostudio/gui/uiwidgets/UITextField.js
Merge pull request #1624 from pandamicro/develop-3.0

Refactor #4240 & #4003: Refactor api to fit -x api