Added MBTA1 to Boston
Add a config file
Allow custom prediction labels
Support several stops on one route

We want to be able to display the MBTA 1 bus in both directions, or both parts
of {Boston,Cambridge} All. This requires distinguishing them, which probably
means that we want to give custom names to routes.

Merge branch 'pretty-routes':
- 6af8a73 Added MBTA1 to Boston [the proximate cause for the desire]
- 393ea43 Add a config file
- 5b62f3e Allow custom prediction labels [to make the first commit generate
  usable output]