Hoist footer so colorbox can use it too

sigal/themes/colorbox/templates/base.html

@@ -36,13 +36,7 @@
             </ul>
           </nav>
           {% endif %}
-          <footer>
-            <p>{% if album.author %}&copy; {{ album.author }} - {% endif %}
-              Generated by <a href="{{ sigal_link }}">sigal</a>
-              {% if 'sigal.plugins.feeds' in settings.plugins %}
-              {% if settings.rss_feed %}<br><a href={{ settings.rss_feed.feed_url }}>RSS Feed</a>{% endif %}
-              {% if settings.atom_feed %}<br><a href={{ settings.atom_feed.feed_url }}>Atom Feed</a>{% endif %}{% endif %}</p>
-          </footer>
+          {% include 'footer.html' %}
         </div>
       </div>
       <div id="main" role="main" class="nine columns offset-by-three">