Add new route_id values to support upcoming spring schedule API changes
Add new route_id values to support upcoming spring schedule API changes

Per MBTA developer information released through the massdotdevelopers
google group (https://groups.google.com/forum/#!topic/massdotdevelopers/kXJuTRqtdfQ),
the realtime API will be changing on March 21: new route_id values will be returned
(e.g. "Red" instead of "931_" and "933_") in the realtime API output. This change
should make this API update transparent to MBTAwesome end users.

kadamwhite/mbtawesome