Refit a calibration file to make gamma curves based on the raw yoked measurements.
This requires, of course, that the yoked measurements were taken during calibration,
which in turn requires the correct settings.
4/29/10 dhb, kmo, ar Wrote it.
5/25/10 dhb, ar Yoked field in describe now set elsewhere.
5/28/10 dhb Update to swing on field yokedmethod.
6/5/10 dhb Use plot subroutines.