Update to 1.02

Upstream changes:
1.02 2014-06-30 NEILB
    - Updated github repo URL after changing my github username
    - Added Algorithm::Damm and Math::CheckDigits to SEE ALSO
    - Fixed errors in pod: using c<...> instead of C<...> and
      not escaping the > character.
    - Added [MetaJSON] to dist.ini so META.json is included in releases

1.01 2014-06-30 NEILB

    - Added SEE ALSO section with links to other LUHN modules.
    - Renamed CHANGES to Changes and reformatted as per CPAN::Changes::Spec
    - Moved LUHN.pm to lib/Algorithm/LUHN.pm, as per convention
    - Switched to Dist::Zilla and set min perl version to 5.006
    - Improved doc for is_valid(), in response to RT#43842

(wen)