This change adds a CLI styled after the Go tool chain, with a design
inspired by that system. It adds 4 new commands, 'run',
'create-cluster', 'join-cluster', and 'version'. Full help is also
supplied.
Local-mode 'run' is fully functional, and 'create-cluster' also works.
This change adds a simple loopback client to the system. It also moves
setting the seed servers to the command line, and removes control from
the configuration file.