Add UK rail train information from the National Rail Enquiries 'Darwin' data feed to Qth.
Example usage:
$ qth_darksky XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX spt man --path=transport/rail/spt
The first argument is an API key for the Darwin 'Lite' web service. The second and third arguments are starting and destination station three-letter-codes. The following Qth properties are created:
[path]
A simplified timetable. A list of strings containing the departure times of
non-cancelled services in the form <scheduled time> (<estimated time>).
[path]/detailed
The full JSON-serialised response of the GetDepBoardWithDetails command from
the OpenLDBWS API.