Fixing #175; add an auto-subscribe and auto-favorite forum topic feature. Added 2 flags to the user profile. Added 2 functions that are called on the post post-save signal that auto-favorite and auto-subscribe the post creator if they have requested this service.

{% load core_tags %}
<p>
<span class="shoutbox-user">{{ shout.user.username }}:</span>
<span class="shoutbox-shout">{{ shout.html|safe }}</span><br />
<span class="shoutbox-date">{{ shout.shout_date|elapsed }}</span>
</p>