Changed the /tutorial/stats/ endpoint to report distinct() numbers.
Changed the /tutorial/stats/ endpoint to report distinct() numbers.

docker/docker-tutorial,SvenDowideit/docker-tutorial,sillvan/docker-tutorial,docker/docker-tutorial,sillvan/docker-tutorial,sillvan/docker-tutorial,SvenDowideit/docker-tutorial,docker/docker-tutorial,SvenDowideit/docker-tutorial