fval_by_budget(): Add support for relative-to-baseline plotting, new plotstyle fval2*_by_budget
ert_by_target(): Offload label selection to _ert_label()
plot_conv ert2*_by_target: Clean up, use get_stratds()
ert_by_ert(): New type of relative-to-absolute ERT plot, new plotstyle ert2*_by_ert*
_*_label(): Clarify the relative labels
plot_conv: Factor out plot_by_type()
plot_conv: Move main code to the __main__ section
plot_conv: Factor out the fig_by_type() function
plot_conv fig_by_type(): Clearer figure label
plot_conv: Add some newlines for clarity
plot_conv fig_by_type(): Return fig, .show() in caller