Fix the friends model by using a symmetrical relation
Fix previous commit
Missing space in html tag
Outing: finishing an outing is a success not an info
Friends: set the autofocus
Account: ask for confirmation

The user is created inactive and is actrivated while visiting the
accounts.register.confirm page.
The link has still to be sent by mail on registration and the right page
created to explain it to the user.
account: inform the user about the confirmation e-mail
Fix pep8 errors
Friends: fix invitation
Profile: print personnal information
Profile: add an update url