Make params.csv and settings.csv more luser proof

[MNGuenther]

If there are any rows that are not recognized (e.g., because of spelling mistakes, missing the _[inst] decoration, or having superfluous _[inst] decorations) in params.csv and settings.csv, the user should be alerted.

[MNGuenther]

Also, if the user applies the setting host_flux_weighted,True, they should be alerted to also use b_flux_weighted,True. Otherwise, ellc appears to not create Rossiter-McLaughlin effects.