~/.bin/rly: Well, it's better to not send everything everytime again.

This is a bugfix. That is, previously *all* commands in one session
were passed to nailgun everytime. How could I test this?

.bin/rly

	cmd = cmplt + cmd
	if is_balanced cmd
		send_to_repl cmd
		cmplt = ""
	else
		cmplt = cmd
		rl.write("  ")