Added files to repository.
Renamed GTDF to GTFS.
Renamed GTDF to GTFS.
Added Stop class, enums, and RequiredAttribute.
Added Route class and RouteType enum.
Added Trip.
Added StopTime class.
Added Calendar class.
Added CalendarDate class and ExceptionType enum.
Added FareAttribute class.
Added FareRule class.
Added Shape class.
Added Frequency class.
Added Transfer class and TransferType enum.
Added FeedInfo class.
Removed and sorted using statements.
Added feed class.
Merge branch 'master' of https://github.com/WSDOT-GIS/GTFS.NET