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.

{% if avatar_url %}
<a href="{% url bio-view_profile username=user.name %}">
<img src="{{ avatar_url }}" alt="{{ user.name }}" style="float:left;margin-right:3px;" /></a>
{% endif %}
<a href="{% url bio-view_profile username=user.name %}">{{ user.name }}</a>:<br />
{{ user.message|safe }}