Created stats for users (number of users and list of newest users). Better separated the forums, who's online, and user stats. Use a Celery task to execute the new user stats processing. This addresses #194 and #238.

{% load url from future %}
{% if show_button %}
<a href="{% url 'forums-edit_post' id=post.id %}"><img src="{{ STATIC_URL }}icons/page_edit.png" alt="Edit post" title="Edit post" /></a>
{% endif %}