fix bug, used to get trip from exact from and to. It doesn't work on a
moving train. Need to guess what's the coming up station to determine
the trip.

Logic is to find trip with destination = to, then from is based on a
time interval (now set to 20 mins). Get the guesstimated trips, find the
closest station (+ direction) to guess trip.

also pull some Dal logic to DalUtils.