- we can even not rely on the existence of a DHID. Check this therefore.

- also refactor class names

- Currently, there is no determination of stop sign kind. So it's unclear whether it is for busses, trams, ferries, etc...

- read stop places, areas and quays
- also extract names, DHID, latitudes and longitudes

- ignore huge ZHV xml

- implement first version of parsing and constructing of ZHV StopPlace objects
- prepare matching against region boundaries