More date incorporation

- Dynamic age calculation on user creation
- Magical fix to make birthday displayed in profile page beautiful
(consider extending to other pages).
- Removed searching for age in search (was causing search to crash)

To do (low priority):
- Bugfix: Everyone (from existing userdb) will have their birthday at
2013 when you log in. Except you. I'm guessing that the birthday
calculation sets the birthday of all your followed people to 2013.
- Beautify date display
- Dynamic age calculation everytime age is requested (instead of when
user is created)