views/user: Moved active_page setting into template
views/user: Use g.user instead of passing user attribute to template
css: Added explicit ul.list-with-dividers class
model/follower: Don't allow to follow yourself
views/user: Go back to request.referrer if possible in un/follow()
views/user: Added /user/.../followers and following views
templates/users: Replaced follower lists on profile with links to new pages

see previous commit
model/follower: Do not join User model automatically

Do this manually if necessary