Add a custom manager to filter private and unpublished stuff (#39)

* Implement a customer manager for flatpages

* Implement public manager for private objects

* Add support for unpublished objects in roster and consist

* Add support for unpublished objects in bookshelf

* Update filtering on REST views

* Use uuid in urls.py

* Increment version

ram/portal/templates/base.html

@@ -186,7 +186,7 @@
                   </ul>
                 </li>
                 {% show_bookshelf_menu %}
-                {% show_flatpages_menu %}
+                {% show_flatpages_menu user %}
               </ul>
               {% include 'includes/search.html' %}
             </div>