regisztracio bugos, de kész
Create new data structure 'Felhasznalo' to hold students and teachers

Danet now holds a dict of Users, with keys of their danetID
Messing with 'danet', c;eaning up, and commenting
Simplify some ifs
Reform registration: OBJECTS
Bad design.

Merge branch 'master' into z2 == lmaresz (kinda)