For #242, move the updating of the POTD sequence into a new signals module. When photos are deleted from the admin changelist in bulk, the individual delete() functions on the photo objects is not called. However, the post_delete signal is called for each object.

{% load url from future %}
{% load markup %}
{% load smiley_tags %}
{% load bio_tags %}
{% avatar user 0 "left" %}{% profile_link user.username %}:<br />{{ msg|safe }}