Update to 1.67:

1.67 2015-01-18 NEILB
    - Version bumped for a non-developer release, now I've sorted all
      the pod issues.
    - Added github repo to metadata and pod

1.66_03 2015-01-16 NEILB
    - More pod & whitespace cleanup

1.66_02 2015-01-15 NEILB
    - Getting pod fails from CPAN Testers for various recent versions
      of Perl. There was an empty =item.

1.66_01 2015-01-10 NEILB
    - First dev release, to check that everything's ok.
    - ABW granted co-maint, so I could set up a github repo and do a
      release with it linked. Thanks to ABW, ADAMK, and MST.

(wiz)