isMobile() has moved under a 'device' key in aframe utils

See aframevr/aframe#2044 for more details.

Author: jesstelford

client/index.js

@@ -1,7 +1,7 @@
 // Here is where we connect to the server and set up our socket listeners
 var socket = io.connect('');
 setUpSocketListeners();
-socket.emit('handshake', AFRAME.utils.isMobile());
+socket.emit('handshake', (AFRAME.utils.isMobile || AFRAME.utils.device.isMobile)());
 
 /**
  * Declare our socket's listeners here.
@@ -129,4 +129,4 @@ function createPlayerCamera() {
 
 function getOnlineUsers() {
     this.socket.emit('getOnlineUsers');
-}
+}