A few small commits

[David-Woroniuk]

Each of the commits are hopefully self explanatory:

• small typo in setup
• Typehints, typechecking and removal of mutable defaults (as previously discussed with @tsrobinson)
• Basic code cleanup using Black
• removal of antipattern (== bool)
• addition of cont_kdes param to docstring (please add a description or remove.
• decorated staticmethods
• added a doctring for the class (formatting)
• removal of antipattern (== bool) and removal of additional non-required \
• add simple sanity checking for savepath

[tsrobinson]

Thanks @David-Woroniuk -- I will review and merge. This all looks great and thanks for carefully documenting everything!!

[David-Woroniuk]

@tsrobinson - no problem. I didn't go for a deep dive on the code, but have a few additional ideas which we can discuss offline :)