created common nav bar in footer, changed send feedback link

src/site/docs/tutorials/remove-elements/index.markdown

 ---
 layout: default
 title: "Target 4: Remove DOM Elements"
 description: "Remove a child element from the DOM"
 has-permalinks: true
 tutorial:
   id: remove-elements
+next: packages
+next-title: "Install Shared Packages"
+prev: add-elements
+prev-title: "Add Elements to the DOM"
 ---
 
 {% capture whats_the_point %}
 
 * Use _element_.remove() to remove an element from the DOM.
 * Remove all children from an element with _element_.children.clear().
 * Function expressions are a convenient way to define single-use functions.
 * => is a shorthand syntax for defining functions that contain just one
 expression.
 * dart:html defines many event-related classes.
@@ skipping 205 matching lines @@
   </li>
 
   <li>
     You can find more information about the DOM and CSS in
     <a href="/docs/dart-up-and-running/">Dart Up and Running</a>,
     which also provides thorough coverage of the Dart language, 
     libraries, and tools.
   </li>
 </ul>
 
-<hr>
-
-<div class="row">
-  <div class="span3">
-  <a href="/docs/tutorials/add-elements/"><i class="icon-chevron-left"> </i> Add Elements to the DOM</a>
-  </div>
-  <div class="span3">
-<a href="http://code.google.com/p/dart/issues/entry?template=Tutorial%20feedback"
- target="_blank">
-<i class="icon-comment"> </i>
-Send feedback
-</a>
-  </div>
-  <div class="span3">
-  <a href="/docs/tutorials/packages/" class="pull-right">Install Shared Packages <i class="icon-chevron-right"> </i> </a>
-  </div>
-</div>
-
 {% endcapture %}
 
 {% include tutorial.html %}