Add new GTFS reader code and an example round-trip
Convert GTFS reference to Java classes
Remove unnecessary links
use CSV library map-style access method. example GTFS entity+factory classes.
remove unused files to avoid compile errors during development
add new abstract superclasses. implement stop_time factory.
add trips
fixes to make GTFSMain run
add fares, feed_info, and other missing GTFS tables.
Merge branch 'obaa_abyrd'
GTFS Error hierarchy. Optional/required fields. Proper field types.
validation stubs, range checking
move gtfs loader to separate package -- it will eventually be a shared dependency.