For #95. You can now make posts with no text in the body if you have attachments. And now if you create a new topic with an attachment, and the POST fails (say you forgot the topic title), we will now re-attach attachments. Also fixed a bug in the smiley code that would arise if it was asked to markup an empty string.

{% load markup %}
{% load smiley_tags %}
{% load avatar_tags %}
{% avatar user "left" %}<a href="{% url bio-view_profile username=user.username %}">{{ user.username }}</a>:<br />{{ msg|safe }}