Adding some management commands to the downloads application to help manage the SG101 MP3 compilations. Added a command to generate a HTML report of all the downloads in a given category. Added a command that generates a bash script that wgets all the files in a category.

Dear {{ to_name }},

Your friend, {{ sender_name }}, wanted to send you a link to an 
interesting story found on {{ site_name }}.

{{ story_title|safe }}
http://{{ site_url }}{{ story_link }}

Thanks!
http://{{ site_url}}