Listing of PUGs Patch

Hello,

Attached is a patch to allow us to dynamically generate and list the local PostgreSQL User Groups (PUGs) on the
communityportion of the website.  This list can easily be managed from the Django admin and contains rooms for add-ons
inthe future. 

This patch should help further the advocacy efforts of the PG community by providing a centralized resource for users
tofind their local PG user groups. 

Please let me know if you have any questions / comments.

Thanks,

Jonathan