Updates strophe.js to 1.2.2

index.html

     <script src="https://cdn.socket.io/socket.io-1.2.0.js"></script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/jsSHA/1.5.0/sha.js"></script>
     <script src="config.js?v=11"></script><!-- adapt to your needs, i.e. set hosts and bosh path -->
-    <script src="libs/strophe/strophe.min.js?v=1"></script>
+    <script src="libs/strophe/strophe.min.js?v=2"></script>
     <script src="libs/strophe/strophe.disco.min.js?v=1"></script>
     <script src="libs/strophe/strophe.caps.jsonly.min.js?v=1"></script>
     <script src="libs/jquery-ui.js"></script>