Fixing #107. Apparently some signal handlers were getting connected twice (double import?) and thus saving a forum post would cause 2 email notifications to go out to the post topic's subscribers. Use the dispatch_uid parameter in the connect call to work around this issue.

{% if show_button %}
<a href="{% url forums-edit_post id=post.id %}"><img src="{{ MEDIA_URL }}icons/page_edit.png" alt="Edit post" title="Edit post" /></a>
{% endif %}