[iRail] continuous integration testing

[Tim Esselens]

Hi All,

I've setup a continuous integration test to test the station list every hour.

AFAICT we need to filter this list down a bit, but it's a start.

More info on:
- http://devel.datif.be
- https://github.com/timesselens/www-irail-api/
- https://github.com/timesselens/www-irail-api/blob/master/devel/realtime_station_list.pl

Also bumped the perl version and added these tests to xt/, they'll be
available on CPAN soon.
--
kind regards,
Tim Esselens