Added and changed:

- Added support for Bean and DAO (database access object)
- Added support for controller servlets
- Added business logic layer packet with managing servlet
- Added an authentication filter for checking if logged in
- Added a servlet filter for disabling GET procedures if needed
- Added mappings for the servlets, for sending to the controller.

- Changed logging in and out procedure (now with DOA and Beans), also
the checking procedure has changed.
- Changed the cookie and session support. Sessions are now more
important, but cookies are more important when user want to keep the
state for a longer time
- Changed some minor bugs
- Changed a lot of code, also refactored a lot of code, so it’s more
readable and secure
- Added more comments