Wide Coverage Demo App updates

+ Add Clear button.
+ Use localstorage to remember entered text between visits.
+ Add a link to it on the GF cloud service start page.

src/www/wc.html

@@ -43,6 +43,7 @@ small { color: #666; }
     <option value=Hin>Hindi</option>
     <option value=Swe>Swedish</option>
   </select>
+  <input type=button value="Clear" onclick="wc.clear()">
   <td style="text-align: right">
     <input type=button name=swap onclick="wc.swap()" value="⇆">
   <td>
@@ -77,7 +78,7 @@ small { color: #666; }
   </div>
 <p>
 <div class=modtime><small>
-<!-- hhmts start -->Last modified: Tue Apr  8 13:22:42 CEST 2014 <!-- hhmts end -->
+<!-- hhmts start -->Last modified: Wed Apr  9 15:43:04 CEST 2014 <!-- hhmts end -->
 </small></div>
 <script src="js/support.js"></script>
 <script src="js/gftranslate.js"></script>