added github ribbon

Author: Cory Fowler

_layouts/default.html

@@ -61,6 +61,8 @@
 		{{ content }}
     </div> <!-- /container -->
 
+	<a href="https://github.com/you"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_white_ffffff.png" alt="Fork me on GitHub"></a>
+  
 	<script src="http://code.jquery.com/jquery.js" type="text/javascript"></script>
 	<script src="./js/bootstrap.min.js" type="text/javascript"></script>
 	<script src="./js/site.js" type="text/javascript"></script>