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_April 30th, 2018_
* Added `-H/--show-hosts` option to `maestro status` to show ship
hostnames/IP address instead of the logical ship name.
* Introduce `--expand-services` and `--all` command-line flags.
When using `stop` or `restart` commands, the user will need to pass in
`--expand-services` to convert service names in given arguments to
container names of those services, or pass `--all` to force "no
arguments" to mean "all containers". Otherwise, Maestro will exit with
an error.