IMPORTANT! Run SQL-Command file in doc folder

+ added user table
+ Added a Class UserModel that gets user related stuff from DB (name/pass/userlvl)
+ Added isUserLoggedIn() to the controller baseclass
+ added security check in mina sidor that:
  -if the user is logged in show Mina Sidor
  -if no user session is alive then show 'login form'
+ added different greeting in header template when logged in/logged out

+ Created a nice li'l link to Mina Sidor
+ Created login form template
+ Created easy login admin link in the login form
+ Created log out link in Mina Sidor