Flipping RenderTexture's sprite instead of scaling it by -1
fix the bug that exit layer can’t end SimpleAudioEngine
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into developAudio
Merge pull request #6305 from samuele3hu/developAudio

fix the bug that exit layer can’t end the SimpleAudioEngine
[AUTO]: updating luabinding automatically
update release note
Merge pull request #6335 from minggo/update-release-note

update release note
Merge pull request #6334 from CocosRobot/update_lua_bindings_1398062637

[AUTO]: updating luabinding automatically
update release note
Merge pull request #6336 from minggo/update-release-note

update release note
[ci skip]
Merge pull request #6300 from elvman/develop

Flipping RenderTexture's sprite instead of scaling it by -1
Enable depth test in test case : TilemapTest->TMXOrthoVertexZ.