Import of JMATES/Music-Canon-2.01 from CPAN.

gitpan-cpan-distribution: Music-Canon
gitpan-cpan-version:      2.01
gitpan-cpan-path:         JMATES/Music-Canon-2.01.tar.gz
gitpan-cpan-author:       JMATES
gitpan-cpan-maturity:     released