Test forbidden trip-to-trip transfer
Fixed bug where all transfers with minimum transfer time were ignored
Added unit tests to test minimum transfer time transfers, preferred
transfers and timed transfers in the static case
Real-time: fix NPE when using frequency-based trip.

State tripTimes used for real-time delay can be null for a frequency-based trip.
Merge pull request #1142 from jkoelewijn/transferTripToTrip

Test trip to trip transfers
Merge pull request #1143 from laurentg/upstream

Real-time: fix NPE when using frequency-based trip.
leaflet client: allow multiple 'open' legs in itin accordion widget; expand transit legs by default (see #1125)
leaflet client: handle interlined transit legs (addresses #1124)
leaflet client: basic support for RAIL trips (addresses #1132)
leaflet client: allow current time to be used when restoring 'default' options; use in Calltaker module (per #1126)
leaflet client: stop display/interactivity at certain zoom levels
leaflet client: refactor route selection ui components from TripViewerWidget; make widget persistent
leaflet client: tweak calltaker mailables letter template per #1137
leaflet client: change service break time to 3am; interim fix for #1139