feat(fleetctl): Add logging to start command
feat(fleetctl): say something when stopping units
feat(fleetctl): log/print things in fleetctl destroy
fix(fleetctl): Remove unused -verify flag
refactor(fleetctl): factor out payload submission code
Merge pull request #282 from bcwaldon/fleetctl-usability

Add logging to subset of fleetctl commands; deduplication of unit submission code