Trying to remember what all of this does.

COLOR1
   Fits each individual field.  Puts each star as a line in COLOR1.OUT
   and saves all points in COLOR1.DAT

COLOR2
   Fits all fields to a common slope but with individual offsets for
   each field.  Results of the fit are put in COLOR2.FIT

PHXBAR
   Looks at RES file for each field and computes transformation
   between PMM and Tycho magnitudes.  Results in PHXBAR.OUT.

COLOR3
   Use the PHXBAR offset and the COLOR1 results.
