Add Jupyter Notebook Widgets

[ndanielsen]

This is an initial issue to track and research incorporating interactive Jupyter Notebook widgets into yellowbrick.

Likely any outputs from this would be well placed in the contrib module

A few potentially bad use cases:

• Feature analysis one or many categories
• Quickly save image
• Change color palettes

There are already a couple existing libraries that some Yellowbrick visualizers could plug into:

• https://github.com/jupyter-widgets/pythreejs
• https://github.com/maartenbreddels/ipyvolume
• https://github.com/bloomberg/bqplot

This issue was inspired by this article: https://towardsdatascience.com/bring-your-jupyter-notebook-to-life-with-interactive-widgets-bc12e03f0916