This is a first shot at porting the Hastie & Tibshirani mda package to
R.  mda and fda with MARS seem to work fine, but bruto is still broken
and segfaults.  Hopefully, this can be fixed soon.

Kurt Hornik
Friedrich Leisch

Actually, mda was not fine: it was doing the pruning incorrectly.
bruto now works.

Brian Ripley 99/08/17

