Update index.html

added link to github repo 'source'

Author: dnkennedy

index.html

@@ -245,6 +245,7 @@ <h2><a class="fragment-identifier" name="contact-us">Contact</a></h2>
                     <li>Copyright &copy; ReproNim 2016-2018</div>
                     <li>Support: <a href="https://projectreporter.nih.gov/project_info_description.cfm?aid=8999833">NIH-NIBIB P41 EB019936</a></li>
                     <li>Site theme: themewagon.com</li>
+	            <li>Site <a href="https://github.com/ReproNim/repronim.github.io">source</a>
                     </ul>
                 </div>
             </footer>