Fix #81: could not get paragraphs in Markdown due to the interaction between smiley and Markdown. Refactored the smilify code to use a series of regular expressions over the text when working with markdown.

<div class="smiley_farm">
{% for s in smilies %}
<img src="{{ s.image.url }}" alt="{{ s.code }}" title="{{ s.title }} {{ s.code }}" />
{% endfor %}
</div>