Get "Try Online" button working (fix #440)

docs/templates/index.liquid

@@ -26,9 +26,8 @@
             </div>
 
             <div class="btn-group" style="float:right">
-              <a class="btn btn-primary dropdown-toggle" data-toggle="dropdown" href="http://jqplay.org">
+              <a class="btn btn-primary" href="http://jqplay.org">
                 Try online!
-                <span class="caret"></span>
               </a>
             </div>