updated missed reference to old bootstrap css

Author: usmonster

index.html

@@ -429,7 +429,7 @@ <h2>
 
 	<script src="js/jquery.min.js"></script>
 	<script src="js/jquery.fn.gantt.js"></script>
-	<script src="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/js/bootstrap.min.js"></script>
+	<script src="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css"></script>
 	<script src="http://taitems.github.com/UX-Lab/core/js/prettify.js"></script>
     <script>