Fix Issue #11

[gpcf]

The track numbers no longer get shown when viewing the S-Bahn departures.

[derhuerst]

FYI there's a quite stable API endpoint called HAFAS. There are two clients for it: hafas-client/p/bvg (JS) and public-transport-enabler (Java).

It would be very helpful to have a Python client for HAFAS, and I'd happily assist with my knowledge.

[derhuerst]

FYI there's a quite stable API endpoint called HAFAS. [...] It would be very helpful to have a Python client for HAFAS, and I'd happily assist with my knowledge.

In kennell/schiene#1 we discussed this further.