Fix browser version wrong
Issue #2457: Merge webAudio and DOM Audio, Reduce the audioEngine logic
Merge branch 'develop' of git://github.com/cocos2d/cocos2d-html5 into develop-audio

Conflicts:
	cocos2d/audio/CCAudio.js
Modify name
Fixed Play webAudio error
Merge pull request #2458 from VisualSJ/develop-audio

Issue #2457: Merge webAudio and DOM Audio, Reduce the audioEngine logic