Add VirtualWorm/OpenWorm reference to the footer

Author: pasky

meteor/client/body.html

@@ -19,7 +19,8 @@
       <p>
         NEMALOAD 2013. Built with
         <a href="http://meteor.com">Meteor.</a>
+        <em>We use c.elegans neuron position data courtesy of <a href="http://caltech.wormbase.org/virtualworm/">VirtualWorm</a> and <a href="http://www.openworm.org/">OpenWorm</a>.</em>
       </p>
     </footer>
   </div>
-</body>
+</body>