Improvements for Reloader for memory curves

- Added: Plots for precision and kappa modified and working now. For Mixed and Hierarchical.
- Added: Plot for EM fit parameters, for Mixed.
Stddev_to_kappa vectorized and other tweaks

- Added: Stddev_to_kappa now has a vectorized version, numpy-style.
- Fix: autoset_parameters set in generator misbinding mixed.
- Fix: Misbinding using burn_sampling argument properly.