0.05 2017-01-12
        - Removed experimental smartmatch operator.

0.04 2014-05-29
        - Fixed License issue (now coherent Artistic License 2.0).

0.03 2013-04-09
        - Makes it possible to set '-once'
          as a signature on initialization.
        - Improved test suite.

0.02 2013-03-04
        - Improved docs by creating an example.

0.01 2013-03-03
        - Added establishment of multiple callbacks.
        - Separation from Sojolicious.