Utilize select_related() for user & user profiles. This commit also removes the caching of the avatar URL in the avatar template tag. This is because we are now using select_related, so we already have the profile & avatar when we get to the tag. Thus we don't need to waste time querying the cache. Removed an apparently unused member map template as well.

syntax: glob
*.log
*.log.?
*.log.?.gz
*.pyc
*.swp
secrets.json
*.db
*.mp3
static_serve
media/avatars/users
media/badges
media/banners
media/downloads
media/podcast
media/potd
media/slideshow
media/smiley
celerybeat-schedule
sg101/xapian_index