For #194, convert the POTD management command to a celery task. Refactored to put the logic for the command into a function, and the command simply calls this function. The task can also just call this function. Added some basic tests for the new function.

{% extends 'base.html' %}
{% block title %}Thanks For The Feedback{% endblock %}
{% block content %}
<h2>Your Message Has Been Sent</h2>
<p>Thank you for the message, it has been emailed to the site management.</p>
{% endblock %}