Clean up openFDA section

[jimhavrilla]

Maybe add some graphs/pie charts for most of the data. Good chance to test those out...openFDA has something similar already but we can make it more catered to our purposes. Perhaps Google visualizations:
https://developers.google.com/chart/interactive/docs/gallery/piechart
May take some finagling, but hopefully pretty straightforward (famous last words)

Also I can add better and more thorough explanations and a navbar.

[jimhavrilla]

Also helpful for potentially moving to javascript arrays (easier for visualization and reference to #84) https://medium.com/@crawftv/javascript-jinja-flask-b0ebfdb406b3