language option is invalid print mesage

If we input invalid mistook language option
Update cocos2d_specifics.hpp

add need unroot
Update cocos2d_specifics.cpp

add need unroot
add overrode init method for LayerMultiplex
type
Merge remote-tracking branch 'parent/develop' into develop

merged from parent
Merge pull request #3484 from ledyba/develop

Override LayerMultiplex::init()
[AUTO] : updating submodule reference to latest autogenerated bindings
Merge pull request #3494 from CocosRobot/updategeneratedsubmodule_1377656189

[AUTO] : updating submodule reference to latest autogenerated bindings
Python2.x 3.x runnable

For Python2.x 3.x runnable, I used print()
Merge pull request #3495 from shinriyo/shinriyo

Python2.x 3.x runnable
[Mac] Adding WebsocketTest and SocketIOTest.
Adding test for issue http://www.cocos2d-x.org/issues/2401 .
Merge pull request #3497 from dumganhar/develop

Adding WebsocketTest and SocketIOTest for Mac and adding test for issue http://www.cocos2d-x.org/issues/2401
Minor fix of 'Color4F(const Color3B& color3B)'. r(color3B.r) --> r(color3B.r/255.0f)
Merge pull request #3498 from dumganhar/develop

Minor fix of 'Color4F(const Color3B& color3B)'. r(color3B.r) --> r(color3B.r/255.0f)
Merge pull request #3474 from xbruce/develop

closed #2746: cc.registerTargettedDelegate doesn't support pure js object as its target.
Update AUTHORS [ci skip]
issue #2747: [Best C++ practice] Deprecating Sprite::displayFrame, adding Sprite::getDisplayFrame.
closed #2747: Don't skip cc.Sprite.getDisplayFrame.