Add comments display to versioning history (because why not).

Maybe in future we could have a box people can type in before they save changes to an event... But that's a separate project

RIGS/templates/RIGS/version_history.html

@@ -35,6 +35,7 @@
                     <td>Version ID</td>
                     <td>User</td>
                     <td>Changes</td>
+                    <td>Comment</td>
                 </tr>
                 </thead>
                 <tbody>
@@ -51,6 +52,9 @@
                                         {% include 'RIGS/version_changes.html' %}
                                     {% endif %}
                                 </td>
+                                <td>
+                                    {{ version.revision.comment }}
+                                </td>
                             </tr>
                         {% endif %}
         			{% endfor %}