write Rolling instead of master into the version listing

_templates/versions.html

@@ -21,7 +21,7 @@
     <dl>
       <dt>In Development</dt>
       {%- for item in versions.in_development|sort(reverse=True) %}
-      <dd><a href="{{ item.url }}">{{ item.name|title }}</a></dd>
+      <dd><a href="{{ item.url }}">Rolling</a></dd>
       {%- endfor %}
     </dl>
   </div>