issue #2103 encapsulate SimpleAudioEngine to audioEngine in lua and modify CocosDenshionTest.lua
Merge branch 'master' of https://github.com/cocos2d/cocos2d-x into audioEngine
issue #2103 modify audioEngine table name to  AudioEngine
Merge pull request #2821 from samuele3hu/audioEngine

Encapsulating SimpleAudioEngine to AudioEngine in lua and updating CocosDenshionTest.lua