v2.13_01

        * BUGFIX: Fixed bug whereby chmod, chown, kill, unlink and
          utime could not throw an exception, even when they didn't
          change all their files, or killed all their processes.

        * BUGFIX: Added support for 'chown', that was previously
          overlooked. Mad props to RsrchBoy for spotting this.
          (GH Pull #13)

        * BUGFIX: Removed executable bits from some bundled text files.

        * BUILD: We now use dzil to manage autodie.

        * TEST: Author tests now look for the AUTHOR_TESTING env
          variable (for dzil compliance).

        * TEST: Better testing for chown, chmod, and unlink.