[socketio-jsb] task: implement onExit method for scene and use SocketIO close method for cleanup
[socketio-jsb] task: update tests to show flexibility with assigning callbacks, either through '=' or 'on' methods
[socketio-jsb] task: clean up some codes, add message handlers for testing
[socketio-jsb] task: update author
[socketio-jsb] task: add test to build.xml file
[socketio-jsb] task: add disconnect method to report client disconnect on label
[socketio-jsb] task: add SocketIO declaration to maintain compat with cocos2d-html5