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

src/site/docs/tutorials/index.markdown

 ---
 layout: default
 title: "Dart Tutorials"
 description: "The Dart Tutorials—Your guide to building great web apps."
 has-permalinks: true
 rel:
   author:
     - mary-campione
 tutorial:
   id: tut-home
@@ skipping 43 matching lines @@
 
         <!-- Getting Started -->
         <div class="span6">
           <section>
           <h4><a href="get-started/"><img src="images/target.png" height="20" width="20">&nbsp;Get started</a></h4>
             <p>Get Dart. Run two apps.
             </p>
           <img src="images/clickme-screenshot.png" width="300">
           </section>
         </div>
+        <div class="span6">
+          <section>
+            <h4>Get the sample code</h4>
+            Before moving on,
+            get the code for all the tutorials' samples.
+            <ol>
+              <li><a href="https://github.com/dart-lang/dart-tutorials-samples/archive/master.zip">
+                    Download the ZIP file.
+                  </a>
+              </li>
+              <li>
+                Unzip it.
+              </li>
+              <li>
+                Open the dart-tutorials-samples directory in Dart Editor.
+              </li>
+              <li>
+                Go to the next tutorial,
+                <a href="/docs/tutorials/connect-dart-html">
+                  Connect Dart & HTML
+                </a>.
+              </li>
+            </ol>
+            </a>
+          </section>
+        </div>
 
       </div> <!-- end row-fluid -->
     </div> <!-- end Getting Started tab -->
 
   <!-- DOM TAB -->
     <div class="tab-pane" id="dom">
 
       Web pages are programmed in HTML and represented
       within the browser as a tree structure
       called the DOM (Document Object Model).
@@ skipping 57 matching lines @@
           </section>
         </div>
         <div class="span6">
 
         </div>
       </div>
     </div> <!-- end Packages tab -->
 
   <!-- POLYMER TAB -->
     <div class="tab-pane" id="polymer">
-<!--
-<aside class="alert" style="background-color:Lavender;color:SlateBlue">
-  <font size="24">
-  <i class="icon-bullhorn"> </i>
-  </font>
-  <a href="/polymer-dart/" target="_blank">Polymer.dart</a>.
-  supersedes Web UI.
-  <a href="/docs/tutorials/polymer/">Polymer Elements</a>,
-  a new tutorial, covers one key feature of Polymer.dart.
-  We've also provided Polymer.dart versions of the tutorial's Web UI apps.
-  Check out the
-  <a href="https://github.com/dart-lang/dart-tutorials-samples/tree/master/web/"
-         target="_blank">tutorials's code repo</a> on github.
-</aside>
--->
       <div class="row-fluid">
 
         <div class="span6">
           <section>
           <h4><a href="polymer-intro/"><img src="images/target.png" height="20" width="20">&nbsp;Define a Custom Element</a></h4>
           <p>Create a custom HTML element using Polymer.</p>
           <img src="images/stopwatch-screenshot.png" width="200">
           </section>
         </div>
 
@@ skipping 67 matching lines @@
     </div>
   -->
 
   </div> <!-- end tab content-->
 </div> <!--end tabbable -->
 </div> <!-- end of tute-tabs -->
 
 {% endcapture %}
 
 {% include tutorial_main_page.html %}