how to retrieve thermochronometry parameters

[mcol]

As a follow-up to #561, we need to find a way of returning the parameters of interest. In particular, it's really quite hard to retrieve the s parameter for the BTS model, since now it's not part of the model fitting. Perhaps we should create a data frame with the fitted parameters and return it as part of the RLum.Results object produced by fit_IsothermalHolding().

[RLumSK]

Thank you! This sounds very meaningful.