Add support for related charm loading and display

app/subapps/browser/templates/browser_charm.handlebars

 <div class="charm yui3-g">
-    <div class="content yui3-u-{{#if isFullscreen}}5-6{{else}}1{{/if}}">
+    <div class="content yui3-u-{{#if isFullscreen}}3-4{{else}}1{{/if}}">
         <div class="nav">
             <a href="" class="back">
                 {{#if isFullscreen}}
                     <img src="/juju-ui/assets/images/browser_back_button_arrow.png"
                         alt="&lt;" />Back
                 {{else}}
                     Close
                 {{/if}}
             </a>
             {{! The add class is used by the deploy method in
@@ skipping 245 matching lines @@
                             <option value="{{ . }}">{{ . }}</option>
                         {{/each}}
                     </select>
                     <div class="filecontent">
                     </div>
                 </div>
             </div>
         </div>
     </div>
     {{#if isFullscreen}}
-        <div class="content-sidebar yui3-u-1-6">
+        <div class="content-sidebar yui3-u-1-4">
             <h3>Useful links</h3>
             <ul class="vertical-links">
                 <li><a href="">Juju community</a></li>
                 <li><a href="">Online resources</a></li>
                 <li><a href="">Write your own Charm</a></li>
                 <li><a href="">Contribute to this Charm</a></li>
             </ul>
+
+            <div class="related-charms">
+            </div>
         </div>
+
     {{/if}}
 </div>