created common nav bar in footer, changed send feedback link

src/site/docs/tutorials/packages/index.markdown

 ---
 layout: default
 title: "Target 5: Install Shared Packages"
 description: "Packages are bundles of source code, tools, and resources that help you to organize and share code"
 has-permalinks: true
 tutorial:
   id: packages
+next: web-ui
+next-title: "Get Started with Web UI"
+prev: remove-elements
+prev-title: "Remove DOM Elements"
 ---
 
 {% capture whats_the_point %}
 
 * Packages are awesome.
 * Packages are cool.
 * Share your code in packages, with all your friends at school.
 
 {% endcapture %}
 
@@ skipping 269 matching lines @@
   <li>
     One important package that you will find there
     is
     <a href="http://pub.dartlang.org/packages/web_ui">web_ui</a>&mdash;a package
     created by the Dart team that lets you use Web components and templating.
     The
     <a href="/docs/tutorials/web-ui/">next target</a> covers Web UI.
   </li>
 </ul>
 
-<hr>
-
-<div class="row">
-  <div class="span3">
-  <a href="/docs/tutorials/remove-elements/"><i class="icon-chevron-left"> </i> Remove DOM Elements</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/web-ui/" class="pull-right">Get Started with Web UI <i class="icon-chevron-right"> </i> </a>
-  </div>
-</div>
-
 {% endcapture %}
 
 {% include tutorial.html %}