Morph "appish" example into a "stocks" app

sky/examples/stocks/stocks.sky

 <!--
 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 -->
 <import src="/sky/framework/sky-drawer.sky" />
 <import src="/sky/framework/sky-element.sky" />
 <import src="/sky/framework/sky-scrollable.sky" />
+<import src="stock.sky" />
 
 <sky-element>
 <template>
   <style>
     :host {
       display: flex;
       flex-direction: column;
       height: -webkit-fill-available;
     }
     sky-drawer {
@@ skipping 25 matching lines @@
     #title {
       flex: 1;
       margin: 0 8px;
     }
     sky-scrollable {
       flex: 1;
       background-color: green;
     }
   </style>
   <sky-drawer id="drawer">
-    <content select=".menu"/>
+    I am drawer
   </sky-drawer>
   <sky-toolbar>
     <div id="menu" />
-    <content id="title" select=".title"/>
+    I am a stocks app
   </sky-toolbar>
   <sky-scrollable>
-    <content />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOGL" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
+    <stock ticker="GOOG" />
   </sky-scrollable>
 </template>
 <script>
 import "dart:sky";
 
-@Tagname('example-scaffold')
-class ExampleScaffold extends SkyElement {
+@Tagname('stocks')
+class Stocks extends SkyElement {
   Element _drawer;
 
   void shadowRootReady() {
     _drawer = shadowRoot.getElementById('drawer');
     Element menu = shadowRoot.getElementById('menu');
     menu.addEventListener('click', _handleMenuClick);
   }
 
   void _handleMenuClick(_) {
     _drawer.toggle();
   }
 }
 
-_init(script) => register(script, ExampleScaffold);
+_init(script) => register(script, Stocks);
 </script>
 </sky-element>