Added README doc.

Renamed example/roc_api to demo.
Added contracts

examples/demo/site/www/themes/bootstrap/tpl/primary_nav.tpl

@@ -0,0 +1,6 @@
+		<ul class="nav navbar-nav navbar-left">
+             {foreach item="item" from="$menu.items"}
+                <!-- TODO check if a menu item is active or not -->
+                <li class="active"><a href="{$item.location/}">{$item.title/}</a></li>
+             {/foreach}
+        </ul>