rename file
Switch to underscores in device name.
Move the brak config into a machine directory.
Add an example config template.
Turn harness into a test suite library.

moved harness/main.go into effio proper so suite setup
and execution can be two separate commands

Wrote the command line parser by using flag's FlagSet directly
which lets you pass in any []string for the argument list,
so the effio.Cmd class can take care of the tedious bits of
command parsing then let flag do just the flag parsing per
command.

Cleaned up old/junk comments.