Add flow cytometry data

[amanda-hi]

Add a plotting option to switch over to protein-level flow cytometry data (if its available for that gene). Could possibly make a conditional checkbox that appears when we have flow data available for that gene.

This would involve gathering all of the flow data I can find for as many genes as possible, and then (ideally) combining them into one dataset (purely for the sake of plotting on a gene-by-gene basis). This might actually be worthwhile to do anyway, since I'm not sure if we have a comprehensive central storage location for our flow data.