Adding NIR next trains support (not yet integrated with the existing APIs), along with a basic command line tool for querying it.  Currently requires mechanize.
Make test_services.py run on the working copy of this library, rather than using the installed copy
Further work on dynamic registration and discovery of services.  Adds support for non-translink services, unofficial service info providers, and a distinction between timetable info providers, and live depatures info.
Merge pull request #10 from lee-b/master

Adding NIR next trains support