language option is invalid print mesage

If we input invalid mistook language option
add overrode init method for LayerMultiplex
type
Merge remote-tracking branch 'parent/develop' into develop

merged from parent
[AUTO] : updating submodule reference to latest autogenerated bindings
Merge pull request #3492 from CocosRobot/updategeneratedsubmodule_1377618171

[AUTO] : updating submodule reference to latest autogenerated bindings[ci skip]
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.