Provide sample output file for each test prog
Connect to unix socket instead of localhost tcp

Unix sockets are better for performance (and security, since permissions
can constrain what clients use the socket) than localhost tcp
connections, so a hard-coded path of /tmp/redis-ipc/socket replaces the old
localhost & port in the category of things-that-probably-belong-in-a-config
Putting documentation README

Still a work in progress, some sections missing...