Tim Tam

Flip featuretest CLI arguments to match the doc [Resolves #486] (#487)
Scheduled monthly dependency update for November (#485)
Associate Experiment with all models and matrices [Resolves #411] (#476)
Clean up Session Closing in Predictor [Resolves #478]
Downcast matrices [Resolves #372]
Update Contribution Guide [Resolves #425]
Initial run of Black for code formatting