changed source for js sdk

Author: Vladlukhanin

samples/chat/index.html

@@ -147,7 +147,7 @@ <h5 class="col-md-12 col-sm-12 col-xs-12" id="all_occupants"></h5>
   <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-timeago/1.4.1/jquery.timeago.min.js" type="text/javascript"></script>
   <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js" type="text/javascript"></script>
 
-  <script src="../../quickblox.js"></script>
+  <script src="../../quickblox.min.js"></script>
   <script src="js/config.js"></script>
   <script src="js/connection.js"></script>
   <script src="js/messages.js"></script>