fix astropy.units issue; comment logging.debug statements
commented logging.debug statement
debugged plots, commented out quantile plot, added errorbars to random

Was having a problem adding errorbars to the plot, fixed inputs.
Commented quantile plot because it was throwing an error and I
didn't feel like dealing with it.
Changed the format of self.all_params from np array to list, because
emcee_plot couldn't handle it as an array.
Added errorbars to the plot of random draws, representing the data
uncertainty added in quadrature to the additional error from the fit.
went back to cropping the burn-in period
modify scripts to test add'l uncertainty w/ masked FeH and splitting bands