ADDED SUPPORT FOR 3 ROOMS --- HARDCODED

-app.js
	-added Prefences but removed from menu because not working
	-changed routes that doesnt need auth
-controllers.js
	-added PreferenceCtrl
	-added call to redirecet to login if user null at start of each controller
	-added class btn-info to the room buttons
	-event click does not open modal (not working)
	-support to 3 rooms ( HARDCODED )
	-small bug fixing in deleteing while master user