Move CCFormatHelper’s content into CCFileUtils

In addition:
CCEGLView: Use frame to request full screen instead of canvas
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into develop
Refactor #3690: Move CCNS.js content into CCCommon.js
Merge pull request #1488 from pandamicro/develop

Move CCFormatHelper and CCNS content into CCCommon.js