Fitting: upon STOP, keep best fit
|Status:||New||Start date:||16 Apr 2019|
When stopping the genetic minimizer, we may end with a fit that is much worse than what had been attained a few steps earlier.
Therefore, after each fit step we should update a register that holds the parameters and the chi2 (or whatever) of the best fit attained so far. Upon stop, parameters should be set to that value.