(cf. http://en.wikipedia.org/wiki/Conway%27s_Game_of_Life and http://racket-lang.org/)
Late February 2015: humble beginnings inspired by a code retreat.
Run all tests, e.g. with
for t in test/*.rkt; do echo "test $t"; racket $t; done
(At the moment the animation tests run about a minute and require you to click their windows closed when they finish.)