Factor out the anchor prefix to easily allow switching to #!

client/web/item.html

 <link rel="import" href="comment.html">
 <link rel="import" href="parameters.html">
 
 <polymer-element name="dartdoc-item">
   <template>
     <ul class="nav nav-pills nav-stacked">
       <li id="nameGoesHere">
-        <a href="#{{item.linkHref}}" id="{{idName}}">{{item.decoratedName}}</a>
+        <a href="{{item.prefixedLinkHref}}" id="{{idName}}">
+            {{item.decoratedName}}</a>
         <template if="{{item.previewComment}}">
           <hr><div is="dartdoc-comment" preview item="{{item}}"></div>
         </template>
       </li>
     </ul>
   </template>
   <script type="application/dart" src="item.dart"></script>
 </polymer-element>