- .load gives clearer error when loading beta values from CSVs ('beta_csv') if probe names are not unique,
and returns a list of series for each sample when indeces fail to merge (pandas.concat)
- .beta_mds_plot() can now suppress the interactive portion and still display plots, using `silent=True` and `plot=True`
(`plot` is a new kwarg, and defaults to `True`). Previously `silent` mode would suppress both prompts and plot display.
Change in behavior: `silent` mode will not disable plotting. Must also include `plot=False` for that.