Move GitHub link to new row

Author: Sunderlandkyl

_includes/themes/twitter/top.html

@@ -39,6 +39,9 @@ <h2>Contact</h2>
     <p>How to cite, where to report errors, ask questions, or get more information.</p>
     <p><a class="btn" href="contact.html">View contact information &raquo;</a></p>
   </div>
+</div>
+
+<div class="row">
   <div class="span4">
     <h2>GitHub</h2>
     <p>See the source code on GitHub.</p>