FINISH the communication API above desktop, mobile and server platform

	修改:         main/application/controllers/mobile_basic.php
	ADD a function to check update message

	修改:         main/application/libraries/Basic.php
	CHANGE app_key

	修改:         mobile_websocket/js/nws_v2_mobile.js
	ADD ping method to test ws connection.
	ADD a mobile receive ws data api

	修改:         websocket/applications/Chat/Event.php
	ADD receive type : mobile