Commit rauchg#9: Fix jquery CDN reference

chat.html

@@ -19,7 +19,7 @@
       <input id="m" autocomplete="off" /><button>Send</button>
     </form>
     <script src="/socket.io/socket.io.js"></script>
-    <script src="http://code.jquery.com/jquery-1.11.1.js"></script>
+    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
     <script>
       var socket = io.connect();