GTFS parser fails on recent files from Caltrain

[GraffJosh]

I made two or three changes to the caltrain.py file to get it to accept a new GTFS file,

If a stop has no stop name the regex fails
#316 >> if _STATIONS_RE.match(r["stop_name"]):

If a trip ID starts with a 7, it couldn't identify the trip type. I don't know what 7 means, so I just bundled it into 6 since that functionality isn't super important to me. I think generally the TransitType probably needs an update since all of the weekday trains I've tried so far are showing as weekend game trains.
#193 >> if trip_id[0] in ("6","7"):

idk if you're still supporting this library or not, but figured I'd let you know.