Additional detail when entering locks
Remove list and read commands from inspect binary

They're in marquise's `data` binary, going via broker. The `inspect`
program is for doing low level inspection of actual Vault buckets.
Adapt to new major API of Marquise client library
Adapt to changed optparse-applicative API
Adapt test cases to new Marquise API
Merge pull request #60 from anchor/more-debug

Additional detail when entering locks. Thanks @tranma.