Add a correction and a option on abun_plot
Add a correction and a option on abun_plot

changed the mass and Teff index to a independent parameter to avoid errors when I want to plot the profile of last model
Add a option to plot q or -log(1-q) on x-axis. This option is x_axis='atm' or 'nuc'. If 'atm', x = -log(1-q).

glauffer/mesa_utils