Add bokeh for interactive visualizations

[MathewBiddle]

Would is be possible to use bokeh to create interactive visualizations?

If so, I could envision this being useful in many other projects.

This page made me think of this question: https://facet.research.gmri.io/heatwaves

[ocefpaf]

Definitely possible, and probably easier too. I went for ploty just b/c I had an example to work with.