TNFS_SE to NFS4

[JimDiabolo]

I'm experimenting again with converting from TNFS to NFS4. I tried this years ago, but I couldn't get the objects to work back then. At least they're there now.

I'm thinking about what we can do with the missing tracks—after all, they aren't round courses. One idea is to combine the sections into one large triangular track.