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="side-block">
<div class="side-block-title">
{% block block_title %}{% endblock %}
</div>
<div class="side-block-content">
{% block block_content %}{% endblock %}
</div>
</div>