Revision history for Perl extension Unknown::Values.

0.003   February 19, 2012
        - Make a non-trial release to claim the namespace on CPAN
        - Update docs to be explicit about EXPORT

0.002   February 19, 2012
        - First release

0.001   February 19, 2013
        - Implement 3VL in Perl ("unknown" instead of "undef")