Allow swipe open the drawer (#1045)

* Allow swipe open the drawer

* Swipe open only when narrow layout

Author: FluorescentHallucinogen

src/my-app.html

@@ -65,9 +65,9 @@
         data="{{routeData}}"
         tail="{{subroute}}"></app-route>
 
-    <app-drawer-layout fullbleed>
+    <app-drawer-layout fullbleed narrow="{{narrow}}">
       <!-- Drawer content -->
-      <app-drawer id="drawer">
+      <app-drawer id="drawer" swipe-open="[[narrow]]">
         <app-toolbar>Menu</app-toolbar>
         <iron-selector selected="[[page]]" attr-for-selected="name" class="drawer-list" role="navigation">
           <a name="view1" href="[[rootPath]]view1">View One</a>