Merge pull request #2552 from dingpinglv/setTransform

Update the AUTHORS.txt and CHANGELOG.txt
Add 3.2 changelog
Merge pull request #2553 from pandamicro/develop

Add 3.2 changelog
Add compatible codes to cc.Audio for IE didn't trigger 'canplaythrough' event
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into setTransform