Update tests
More test updates
Switch of protocol buffer generation tool from protobuf-csharp-port to protobuf-net
New test project with protobuf-net
Remove old projects
Extend tests to new project.
Move protobuf-net folder from /vfb to /gtfs
Update SubwayProto.cs to add NyctStopTimeUpdate property to GTFS StopTimeUpdate.  Update tests.