implement interactions for link up/down flow up/down
setup controller interface. link up/down not currently working (or I'm not using them correctly)
diff --git a/web/ons-demo/index.html b/web/ons-demo/index.html
index 234f1fb..e89f409 100644
--- a/web/ons-demo/index.html
+++ b/web/ons-demo/index.html
@@ -7,6 +7,7 @@
 	<script src="js/async.js"></script>
 	<script src="js/utils.js"></script>
 	<script src="js/model.js"></script>
+	<script src="js/controller.js"></script>
 </head>
 
 <body>