Travel-Status-DE-IRIS-1.57.tar.gz (signature)

• Result: Add arrival_has_realtime, departure_has_realtime, has_realtime accessors
• Result->delay_messages: Leave out superseded messages (right now, the only case is "Defekt am Zug" -> "Behobener Defekt am Zug")
• Stations: Add swiss and austrian stations reachable from Waldshut and Lindau