add a command to output the configuration

not super pretty, but provides a way to verify your configuration,
whether json or yaml is being read the way you expect.
Merge branch 'add_check_command'

* add_check_command:
  add a command to output the configuration

Conflicts:
	cmd.go5
container.go: fix docker parm ID to Id to get the id of the container

else, various crane commands fail because crane cannot even tell that
a container exists.