removing links to github in favor of downloading a zipfile from github

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

 ---
 layout: default
 title: "Add Elements to the DOM"
 description: "You have an Element object, now what?"
 has-permalinks: true
 tutorial:
   id: add-elements
 next: remove-elements/
 next-title: "Remove DOM Elements"
 prev: connect-dart-html/
 prev-title: "Connect Dart & HTML"
 ---
 
 {% capture whats_the_point %}
 
 * In Dart, page elements are of type Element.
 * An Element knows its parent.
 * An Element keeps its children in a List\<Element>.
 * Change the DOM by adding or removing children of elements.
 * Respond to user input with an EventListener.
 
 {% endcapture %}
 
 {% capture sample_links %}
 
+<p> This tutorial features these examples:</p>
+* todo
+* anagram
+
 <p>
-Get the source code for the samples featured in this tutorial:</p>
-
-<ul>
-  <li>
-    <a href="https://github.com/dart-lang/dart-tutorials-samples/tree/master/web/add-elements/todo"
-       target="_blank">todo</a>
-  </li>
-  <li>
-    <a href="https://github.com/dart-lang/dart-tutorials-samples/tree/master/web/add-elements/anagram"
-       target="_blank">anagram</a>
-  </li>
-</ul>
+Don't have the source code?
+<a href="https://github.com/dart-lang/dart-tutorials-samples/archive/master.zip">
+  Download it.
+</a>
 
 {% endcapture %}
 
 {% capture content %}
 
 <div class="tute-target-title">
 <h1>{{page.title}}</h1>
 <h3>Dynamically add items to the browser page.</h3>
 </div>
 
@@ skipping 333 matching lines @@
 </ul>
 
 ##What next?
 
 The next tutorial, [Remove DOM Elements](/docs/tutorials/remove-elements/),
 describes how to remove elements from the DOM and items off your todo list.
 
 {% endcapture %}
 
 {% include tutorial.html %}