Version 1.0. Finished product
Version 0.8. Scan class made
Version 0.7. Clock refactored and unit tests added.
Version 0.6. Unit tests for TrainDepartureRegister added.
Version 0.5. Unit tests for TrainDeparture added.
Version 0.4. Wrong input by programmer can now be handled.
Version 0.3. Wrong input can now be handled.
Version 0.2. Improvments yet to come.
Version 0.1. improvments yet to come