v0.0994_01

      [NEW COMMANDS]

      - The "revert" command allows you to restore a stack to a previous
      revision.  This command is still experimental.  See the POD for more
      details.

      [BUG FIXES]

      - The "install" command threw an exception with a misleading error
      message when using the -m option without --do-pull.  Now, both the
      -m and -M options are silently ignored when --do-pull is not used.
      Fixes GH #145 (thanks, @hartzell)