[N9,SYM,BB10] Use mode and dateTime properties of FahrplanBackend in UI.
Added few more error code descriptions to HAFAS Binary backend.

Changed parameter from int to StationType in Fahrplan::swapStations() and
Fahrplan::resetStation() methods.
[N9,SYM,BB10] Remember last active tab in StationSelect during app run.
[XML VastTrafic] Use station ID when searching for journey or timetable.

See #24 for details.