New criterion release works on Macs

And has prettier charts, too, thanks to a patch from Tim Docker.

If you already have criterion installed:

$ cabal update
$ cabal install --reinstall criterion

If you want to use criterion on a Mac:

$ cabal update
$ cabal install criterion -f-chart

Alas, on OS X, you’ll lack the ability to directly generate pretty chart images, but criterion will still output CSV files for you. You can import these into gnuplot or your favourite spreadsheet with ease, and chart away from there.