add sticky footer example per martin bean's suggestion, using the implementation by ryan fait

docs/getting-started.html

@@ -277,6 +277,15 @@
               <h4>Sign in</h4>
               <p>Barebones sign in form with custom, larger form controls and a flexible layout.</p>
             </li>
+            <li class="span3">
+              <a class="thumbnail" href="examples/sticky-footer.html">
+                <img src="assets/img/examples/bootstrap-example-sticky-footer.png" alt="">
+              </a>
+              <h4>Sticky footer</h4>
+              <p>Pin a fixed-height footer to the bottom of the user's viewport.</p>
+            </li>
+
+<!--
             <li class="span3">
               <a class="thumbnail" href="examples/carousel.html">
                 <img src="assets/img/examples/bootstrap-example-carousel.png" alt="">
@@ -284,7 +293,7 @@
               <h4>Carousel jumbotron</h4>
               <p>A more interactive riff on the basic marketing site featuring a prominent carousel.</p>
             </li>
-
+ -->
           </ul>
         </section>