Login added, not finished or tested

Code should be moved and things needs to be more clean. Not tested on
real server, only dev. server. Installation install all users with the
same password, abc123, and cannot be changed right now. Some change to
the SQL structure as a password field was added to the table users.
Moved code that outputs HTML to views

Devided login logic from logic of the movie database
Rate and post news as yourself

You can now only rate movies and post news under your own username after
the login have been added.
Added possibility to change password

Still not tested on production server
Removed debug code