issue #5032:A potential crash bug of Lua binding
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3_lua_fix
Export the `2d` include directory of engine on android.
Merge pull request #6596 from natural-law/v3

Export the `2d` include directory of engine on android.
add some comment for dependences module in Android.mk to make it simple to use other module
:= -> +=
Merge pull request #6598 from minggo/android-makefile

add some comment for dependences module in Android.mk to make it simple ...
Merge pull request #6595 from samuele3hu/v3_lua_fix

close #5032: A potential crash bug of Lua binding for sp.SkeletonAnimation.setAnimation
Update CHANGELOG [ci skip]
[AUTO]: updating luabinding automatically
Comments fix in CCRenderTexture.h
Merge pull request #6600 from dumganhar/objc-comments-fix

Comments fix in CCRenderTexture.h
Merge pull request #6599 from CocosRobot/update_lua_bindings_1399451378

[AUTO]: updating luabinding automatically
Update the reference of submodule plugin-x.
Merge pull request #6597 from dumganhar/v3

Re-adds download-deps.py, unzip works ok and output more detail informations
Merge pull request #6601 from natural-law/v3

Update the reference of submodule plugin-x.