Change CFDMesh NASCART export triangle orientation to be consistent with MeshGeom import/export

This may be incorrect, but it is more consistent with the rest of what
we do in VSP.
Remove unused VspCurveInfo and VspPntData
Fix VspCurve 01 methods to not assume tmax==num_sects.
Make some VspCurve methods protected to better hide implementation.
Change VspSurf 01 routines to not assume NumSect == max parameter.
Make VspSurf GetNumSect routines protected to better hide implementation