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.

.user_photo {
   margin: 1em;
   display: inline-block;
}
.owner_photo {
   border: 1px solid gray;
}
.owner_photo img {
   margin: auto;
   width: 100%;
}
hr.footer_divider {
   margin-top: 1.5em;
}