fixed #1569 add support for audio format - mp4,m4a
Accelerometer
Update closure compiler to the latest for feature issue #1651
Merge pull request #792 from ShengxiangChen/issue1569_audioJSB

fixed #1569 add support for audio format - mp4,m4a
Merge pull request #793 from ShengxiangChen/issueXXX_AccelerateForHTML5AndJSB

Accelerometer bug
Fix rounding errors on ease actions

When update(t) and t==1 or t==0, then the inner function should receive
t=1 or t=0
Merge pull request #798 from ayuer/master

Update Google Closure to latest version
Merge pull request #801 from ricardoquesada/ease_rounding_error_fix

Fix rounding errors on ease actions
Fixed #1615 Let WebGL render code separate from Canvas render code
Merge branch 'master' of https://github.com/cocos2d/cocos2d-html5 into iss1615_WebGLRendering