switch isotherm plot to bokeh

[ltalirz]

change isotherm plot from matplotlib to bokeh. matplotlib plot was taking ~1s of total load time, also was non-interactive.

[review-notebook-app[bot]]

Check out this pull request on 

You'll be able to see Jupyter notebook diff and discuss changes. Powered by ReviewNB.

[ltalirz]

@danieleongari I switched the isotherm plot from matplotlib to bokeh. can you have a look and let me know whether this is ok?

I'm not sharing the axes here since it is more tedious to do in bokeh - but it can be done if needed, see here

[ltalirz]

matplotlib

bokeh

[danieleongari]

This looks really nice! Thanks!