Merge changes from topic "lshal_released"

* changes:
  lshal: add docs to Status.
  lshal: remove unused "break".
  lshal: register options for ListCommand.
  lshal: Lshal register commands
  lshal: add HelpCommand
  lshal: Add class Command.
  lshal: DISALLOW_COPY_AND_ASSIGN needs to be in private