Update index.html

Author: ptsource

index.html

@@ -31,6 +31,7 @@
             <li><a href="#content">Description</a></li>
 	    <li><a href="https://wiki.ptsource.eu/soft/vrgrid/tutorial">Tutorial</a></li>
             <li><a href="https://wiki.ptsource.eu/soft/vrgrid/start">Features</a></li>
+			 <li><a href="https://ko-fi.com/ptsource">Ko-fi</a></li>
         </ul>
         </nav>
     </header>
@@ -159,6 +160,7 @@ <h2>
 	<a href="https://www.facebook.com/ptsource.eu/"><i class="fa fa-facebook fa-lg"></i></a>&nbsp;
 	<a href="http://tv.ptsource.eu/"><i class="fa fa-youtube fa-lg"></i></a>&nbsp;
 	<a href="https://wiki.ptsource.eu/soft/vrgrid/start"><i class="fa fa-pencil fa-lg"></i></a>&nbsp;
+	<a href="https://ko-fi.com/ptsource"><i class="fa fa-coffee fa-lg"></i></a>&nbsp;
 	</div>
 	</h2>
         <br />