Reorder result classes to put Isolated TST+ on top of bars.

Per RR.

Makes a lot of sense - I prefer having the more-believable results toward
the bottom because it makes it easier to imagine different trends in
"true positives" over time and age.
Add a table of result class by age. Fixes #9.

Tweaked an existing data structure to work - this required converting its
proportions into formatted percentages and subsequent minor changes to plots.