adding new command-line app tutorial

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 21 matching lines @@
 
 <div class="tute-tabs">
 <div class="tabbable">
   <ul class="nav nav-tabs">
     <li class="active"><a href="#basics" data-toggle="tab">Get started</a></li>
     <li><a href="#dom" data-toggle="tab">Browser</a></li>
     <li><a href="#packages" data-toggle="tab">Packages</a></li>
     <li><a href="#polymer" data-toggle="tab">Polymer</a></li>
     <li><a href="#futures" data-toggle="tab">Futures & Streams</a></li>
     <li><a href="#forms" data-toggle="tab">Forms & Data</a></li>
+    <li><a href="#commandline" data-toggle="tab">Command-line apps</a></li>
     <!--<li><a href="#mobile" data-toggle="tab">Mobile</a></li>-->
   </ul>
 
   <div class="tab-content">
 
   <!-- BASICS TAB -->
     <div class="tab-pane active" id="basics">
 
       Download the software and
       discover which tools and libraries you get with the bundle.
@@ skipping 188 matching lines @@
           <h4 class="no-permalink"><a href="indexeddb/"><img src="images/target.png" height="20" width="20">&nbsp;Use IndexedDB</a></h4>
           <p>Save data on the client with IndexedDB.</p>
           <img src="images/countdown-screenshot.png" width="300">
           </section>
         </div>
         <div class="col-md-6">
         </div>
       </div> <!-- end row -->
     </div> <!-- end FORMS tab -->
 
+    <!-- COMMAND-LINE APPS TAB -->
+    <div class="tab-pane" id="commandline">
+      <div class="row">
+
+        <div class="col-md-6">
+          <section>
+          <h4 class="no-permalink"><a href="cmdline/"><img src="images/target.png" height="20" width="20">&nbsp;Write Command-line Apps</a></h4>
+          <p>Learn about features that command-line apps need.</p>
+          <img src="cmdline/images/sourceforhomepage.png">
+          </section>
+        </div>
+
+        <div class="col-md-6">
+        </div>
+
+      </div>
+    </div>
+
   <!-- MOBILE TAB -->
   <!--
     <div class="tab-pane" id="mobile">
       <div class="row">
 
         <div class="col-md-6" style="border-right:1px solid Lavender">
           <section>
           <h4 class="no-permalink"><a href="mobile/"><img src="images/target.png" height="20" width="20">&nbsp;Write for Mobile Devices</a></h4>
           <p>Mobile devices are taking over the world!</p>
           <img src="images/countdown-screenshot.png" width="300">
           </section>
         </div>
 
         <div class="col-md-6">
         </div>
 
       </div>
     </div>
   -->
 
   </div> <!-- end tab content-->
 </div> <!--end tabbable -->
 </div> <!-- end of tute-tabs -->
 
 {% endcapture %}
 
 {% include tutorial_main_page.html %}