Kappa scan - Githubissues

Functionality to fit models with a variety of kappa values to find the parameter regime that gives desired syllable time scale.

Added kappa_scan function to fitting.
Added IO for results of a kappa scan
Added plotting for kappa <-> median-duration relationship, i.e. for results of a kappa scan
Added section to tutorial notebook using kappa_scan and supporting functions
Updated fit_model with optional early stopping via tol parameter, following scikit-learn api

dattalab / keypoint-moseq