code to upload and change avatars.
combined some code in the settings area, too.
darcs-hash:20080517122045-84dde-8e13994e627805f29679c9533c2f62db81dc0925.gz
Did considerable work on the settings section.
Redesigned the DB to allow avatars. Each avatar image has a size and
an URL. There can be multiple avatars per profile, just different sizes.
Added accessors in Profile for avatar. Show the avatar in lots of
places, where it makes sense. Constants for avatar sizes in common.php.
darcs-hash:20080515162844-84dde-fe0630366e247c02ca8ca9d1cc6b963cfce57a26.gz
