Merge pull request #2534 from dingpinglv/setTransform

Correct a bug of cc.AudioEngine and rename boundingBox to getBoundingBox in spine
Audio -add if-getPlaying() into touch the playing background music
Merge pull request #2535 from VisualSJ/3.2

Audio -add if-getPlaying() into touch the playing background music
Fixed: corrected a bug of ccs.Armature that it crashed when adding a child to it.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into setTransform