Add a search and menu button to 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-icon.sky" />
 <import src="/sky/framework/sky-scrollable.sky" />
 <import src="stock.sky" as='view'/>
@@ skipping 18 matching lines @@
       right: 0;
     }
     sky-toolbar {
       display: flex;
       align-items: center;
       background-color: #3F51B5;
       color: white;
       height: 56px;
       box-shadow: 0px 4px 4px grey;
     }
-    #menu {
+    sky-icon {
       display: flex;
       justify-content: center;
       align-items: center;
       padding: 7px;
-      margin: 0 8px;
+      margin: 0 4px;
       color: black;
     }
     #title {
       flex: 1;
-      margin: 0 8px;
+      margin: 0 4px;
     }
     sky-scrollable {
       flex: 1;
     }
   </style>
   <sky-drawer id="drawer">
     I am drawer
   </sky-drawer>
   <sky-toolbar>
     <sky-icon id="menu" type="navigation/menu_white" size="24" />
-    I am a stocks app
+    <div id="title">I am a stocks app</div>
+    <sky-icon type="action/search_white" size="24" />
+    <sky-icon type="navigation/more_vert_white" size="24" />
   </sky-toolbar>
   <sky-scrollable id='stock_list'>
   </sky-scrollable>
 </template>
 <script>
 import "dart:sky";
 import "dart:math";
 
 List pick(List list, int count) {
   var rng = new Random();
@@ skipping 26 matching lines @@
   }
 
   void _handleMenuClick(_) {
     _drawer.toggle();
   }
 }
 
 _init(script) => register(script, Stocks);
 </script>
 </sky-element>