cpan-release-counts: add a --distprefix parameter that allows sampling by distname of a certian leading substring, ie: cpan-release-counts --distprefix Moose shows all Moose- and MooseX-
cpan-heavyweights: add --distprefix option
Merge pull request #1 from kentfredric/master

cpan-release-counts: add a --distprefix parameter