initial checkin.
moved the various sections to their own work files.
added supports and stands to the full track.
added pieces file.
created inventor parts and assembly for the track.
added export of faces for use in vcarvepro.
updated cars.
added vcarvepro files.
added vcarvepro shopbot export files.
recreated the nd a (short curved pieces) vcarve file and toolpaths to use 2 tabs instead of just 1.
updates for cutting parts out on a shopbot alpha.
Merge /Users/peter/projects/nerdyderby