YaGTFS: allow specifying trips#stop_times as arrays instead of hashes
YaGTFS: add service restrictions in trips#departures using prefixes
YaGTFS: complain if the data directory contains files newer than the static timetables
YaGTFS: allow multiple agencies/routes/trips per YAML file
Add HuGTFS::FeedManagerConvert role for download-convert/edit-parse feeds
Cal: Add 'DESC' descriptor operator
YaGTFS: print file being loaded to assist with debugging
Add a Zala Volán [Nagykanizsa] feed manager