Share state using session control object, add missing licenses, fix wrong license.

guacamole/src/main/webapp/client.xhtml

@@ -68,6 +68,7 @@
         <script type="text/javascript" src="guacamole-common-js/oskeyboard.js"></script>
 
         <!-- guacamole-default-webapp scripts -->
+        <script type="text/javascript" src="scripts/session.js"></script>
         <script type="text/javascript" src="scripts/interface.js"></script>
 
         <!-- Init -->