Split util into two file:

- util.js that contains essential functions
 - webutils.js that contains the GUI utility function.js

this helps to include noVNC in other project, especially Cappuccino Application
i

tests/ws.html

@@ -4,6 +4,7 @@
         <title>WebSockets Test</title>
         <script src="include/base64.js"></script>
         <script src="include/util.js"></script>
+        <script src="include/webutil.js"></script> 
         <!-- Uncomment to activate firebug lite -->
         <!--
         <script type='text/javascript'