Issue #4730: fixed an error in CCBoot.js when using Google closure compiler advanced mode
Merge branch 'develop-3.0' of https://github.com/cocos2d/cocos2d-html5 into Iss4730_IEMouse

Conflicts:
	CCBoot.js
Merge branch 'develop-3.0' of https://github.com/cocos2d/cocos2d-html5 into Iss4730_IEMouse
Closed #4730: fixed a bug of inputManager's touch event in IE browser
Merge pull request #1755 from dingpinglv/Iss4730_IEMouse

Closed #4730: fixed a bug of inputManager's touch event in IE browser