this was a durp if i ever saw one
kill my misplaced commit log comment abput the snappy3-->snappy2 merge
repair the test harness ((tho the tests themselves need work))
repair the flipping density plots

Now uses shiny brand spanking new 2014 Camaro plot.compare(), which is much more flexible than what I had before
prettier printing: label the output plots by algorithm.
move the algorithm labels to sub= because R makes it too difficult to title() sets of plots
Do Kolmogorov-Smirnov tests on the marginals.

This code is ugly, but very, very useful.