Updates versions.

index.html

     <script src="muc.js?v=9"></script><!-- simple MUC library -->
     <script src="estos_log.js?v=2"></script><!-- simple stanza logger -->
     <script src="desktopsharing.js?v=1"></script><!-- desktop sharing -->
-    <script src="app.js?v=23"></script><!-- application logic -->
-    <script src="chat.js?v=3"></script><!-- chat logic -->
-    <script src="util.js?v=2"></script><!-- utility functions -->
-    <script src="etherpad.js?v=5"></script><!-- etherpad plugin -->
-    <script src="prezi.js?v=1"></script><!-- prezi plugin -->
+    <script src="app.js?v=24"></script><!-- application logic -->
+    <script src="chat.js?v=4"></script><!-- chat logic -->
+    <script src="util.js?v=3"></script><!-- utility functions -->
+    <script src="etherpad.js?v=6"></script><!-- etherpad plugin -->
+    <script src="prezi.js?v=2"></script><!-- prezi plugin -->
     <script src="smileys.js?v=1"></script><!-- smiley images -->
     <script src="replacement.js?v=5"></script><!-- link and smiley replacement -->
     <link href="//netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.css" rel="stylesheet">
     <link rel="stylesheet" href="css/font.css"/>
-    <link rel="stylesheet" type="text/css" media="screen" href="css/main.css?v=19"/>
+    <link rel="stylesheet" type="text/css" media="screen" href="css/main.css?v=20"/>
     <link rel="stylesheet" type="text/css" media="screen" href="css/videolayout_default.css?v=1" id="videolayout_default"/>
-    <link rel="stylesheet" type="text/css" media="screen" href="css/videolayout_fullscreen.css?v=1" id="videolayout_fullscreen" disabled>
     <link rel="stylesheet" href="css/jquery-impromptu.css?v=4">
     <link rel="stylesheet" href="css/modaldialog.css?v=3">
     <!--