Changes url to source in few samples

Author: Vladlukhanin

samples/chat/index.html

@@ -26,7 +26,7 @@
             <li><a href="#" onclick="showNewDialogPopup()">Create dialog</a></li>
             <li><a href="#" onclick="showDialogInfoPopup()">Dialog info</a></li>
           </ul>
-          <a href="https://github.com/QuickBlox/quickblox-javascript-sdk/"
+          <a href="https://github.com/QuickBlox/quickblox-javascript-sdk/tree/gh-pages/samples/chat"
       		style="position:absolute;top:20px;right:12%;font-size:0.85em;color:grey;">View source on GitHub</a>
         </div><!--/.nav-collapse -->
       </div>

samples/content/index.html

@@ -15,7 +15,7 @@
   <div class="row site-head">
   	<div id="logo" class="">
   	  <a href="https://quickblox.com/"><img class="logo" src="images/logo-quickblox.png" alt="QuickBlox Samples"></a>
-  	    <a href="https://github.com/QuickBlox/quickblox-javascript-sdk/tree/master/samples/content"
+  	    <a href="https://github.com/QuickBlox/quickblox-javascript-sdk/tree/gh-pages/samples/content"
     	style="position:absolute;top:20px;right:7%;font-size:0.85em;color:grey;">View source on GitHub</a>
   	</div>
     <h1 class="title">

samples/customobjects/index.html

@@ -55,7 +55,7 @@ <h4 class="modal-title" id="myLargeModalLabel">QuickBlox Sample Custom Object</h
   </div>
 
   <div class="container" style="position:relative;">
-    <a href="https://github.com/QuickBlox/quickblox-javascript-sdk/tree/master/samples/customobjects"
+    <a href="https://github.com/QuickBlox/quickblox-javascript-sdk/tree/gh-pages/samples/customobjects"
     style="position:absolute;top:20px;right:0px;font-size:0.85em;color:grey;">View source on GitHub</a>
     <button class="btn btn-primary" data-toggle="modal" data-target=".bs-example-modal-lg" id="add-btn">Add new post</button>
     <img src="images/loader.gif" id="load-img">

samples/roster/index.html

@@ -46,7 +46,7 @@ <h3 class="modal-title">Sign In to QuickBlox Contact_List sample</h3>
       </div>
     </div>
 
-    <a href="https://github.com/QuickBlox/quickblox-javascript-sdk/tree/master/samples/roster"
+    <a href="https://github.com/QuickBlox/quickblox-javascript-sdk/tree/gh-pages/samples/roster"
     style="position:absolute;top:2%;right:13%;font-size:0.85em;color:grey;">View source on GitHub</a>
 
   </div>

samples/users/index.html

@@ -247,7 +247,7 @@ <h4 class="modal-title">Processing</h4>
       </div>
     </div>
 
-    <a href="https://github.com/QuickBlox/quickblox-javascript-sdk/tree/master/samples/users"
+    <a href="https://github.com/QuickBlox/quickblox-javascript-sdk/tree/gh-pages/samples/users"
     style="position:absolute;top:2%;right:13%;font-size:0.85em;color:grey;">View source on GitHub</a>
 
   </div>