Rename template to article

templates/article/index.html

@@ -116,7 +116,7 @@
         </footer>
       </main>
     </div>
-    <a href="https://github.com/google/material-design-lite/blob/master/templates/simple/index.html" target="_blank" id="view-source" class="mdl-button mdl-js-button mdl-button--fab mdl-button--colored mdl-js-ripple-effect mdl-color--accent"><span class="mdl-icon mdl-icon--pageview"/></a>
+    <a href="https://github.com/google/material-design-lite/blob/master/templates/article/index.html" target="_blank" id="view-source" class="mdl-button mdl-js-button mdl-button--fab mdl-button--colored mdl-js-ripple-effect mdl-color--accent"><span class="mdl-icon mdl-icon--pageview"/></a>
     <script src="/material.min.js"></script>
   </body>
 </html>