changed all image plots to use cmap='gray', connected trace function with --debug-plot argument
changed all image plots to use cmap='gray', connected trace function with --debug-plot argument

Added trace fit rms calculation and logging message

simontorres/goodman,soar-telescope/goodman,simontorres/goodman,soar-telescope/goodman,simontorres/goodman,soar-telescope/goodman