Minor cleanup and new member list features

Cleanup:

- Reduced the height of the main nav
- Removed table layouts on password reset forms
- Removed body and html closing tags from footer.php so custom javascript can be added to the end of pages

Features:

- Added mailing list link to homepage above IRC link
- Added search and sort capabilities to member list page. Members can now search and sort by full name or member ID (searching already possible using ctrl-f in page but sorting was broken). Admins can now search and sort on full name, member id, email, doorbot name and subscription status. Admins also get an 'include unsubscribed members' checkbox.