added get_fit_from_PSD and get_fit_auto function for more automated fitting
added get_fit_from_PSD and get_fit_auto function for more automated fitting

AshleySetter/datahandling,markusrademacher/datahandling,AshleySetter/optoanalysis,AshleySetter/optoanalysis,markusrademacher/datahandling,AshleySetter/datahandling