Wishlist: Configurable axis labels and units

[pfh]

For PAT-seq differential tail lengths, the axis labels on the MA-plot aren't correct. It would be nice if I could pass alternative labels as a parameter to degust.py.

The current labels also don't indicate units. I presume "log" means "log2", and "Avg Expression" is "log2 RPM". Also not clear that fold changes in the table are log2.

Biologists already struggle with logs, they're liable to misinterpret things unless you make it very clear. It's almost tempting to eliminate logs entirely and use something like:
↑×n.nn
↓×n.nn