axis labels and tick marks on scatter plots

When doing comparisons between different metrics on the compare tab, it would be really important for there were units and if the axes were labeled with the chosen metrics. I don't see any units or tick marks on the plots that are easy to interpret.

Right now the plots are just too raw to really be tweetable or near-publication ready, and I think improving this will really improve the impact of brain-score.

Start at the compare tab and locate the implementation of its scatter plots. Review how the chosen metrics and units are represented, then make the axes show metric labels, units, and interpretable tick marks. Done means comparison plots are clearer and closer to being suitable for sharing or publication.

Written by the indexing model from the issue text.