Add new botlist for swarming

appengine/swarming/elements/res/imp/index/swarming-index.html

 <!--
   Copyright 2016 The LUCI Authors. All rights reserved.
   Use of this source code is governed under the Apache License, Version 2.0
   that can be found in the LICENSE file.
 
   This in an HTML Import-able file that contains the definition
   of the following elements:
 
     <swarming-index>
 
@@ skipping 13 matching lines @@
   Events:
     None.
 -->
 
 <link rel="import" href="/res/imp/bower_components/iron-ajax/iron-ajax.html">
 
 <link rel="import" href="/res/imp/common/swarming-app.html">
 
 <dom-module id="swarming-index">
   <template>
-    <style>
-      :host {
-        display: block;
-      }
+    <style include="swarming-app-style">
+
     </style>
 
     <swarming-app
       auth_headers="{{auth_headers}}"
       name="Swarming"
       busy="[[busy]]">
 
       <iron-ajax id="request"
         url="/_ah/api/swarming/v1/server/details"
         headers="[[auth_headers]]"
@@ skipping 24 matching lines @@
         }
       },
 
       signIn: function(){
         this.$.request.generateRequest();
       },
 
     });
   </script>
 </dom-module>