Summary: Add the author's pledge to the distribution

Description:
'Dist::Zilla::Plugin::Covenant' adds the file '_AUTHOR_PLEDGE_' to the
distribution. The author as defined in _dist.ini_ is taken as being the
pledgee.

The _META_ file of the distribution is also modified to include a
_x_author_pledge_ stanza.

URL: http://search.cpan.org/dist/Dist-Zilla-Plugin-Covenant
License: GPL+ or Artistic

Maintainer: nobody