Add link to full list of http-kernel users on symfony.com

Author: igorw

source/index.html

@@ -62,6 +62,8 @@ <h2 class="text-center">Supported frameworks</h2>
         <li><a href="http://yolophp.com/"><img src="{{site.url}}/img/users/yolo.png" alt="Yolo" /></a></li>
     </ul>
     {% endspaceless %}
+
+    <p><a href="http://symfony.com/components/HttpKernel">See the full list on symfony.com</a></p>
 </div>
 
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