Revert "separate Genome::Sys::Lock from Genome so that Net::Statsd doesn't need to ship with it"

This reverts commit 2d47dd95cecde727a2fc0cc9246725b2da42072f.
Merge branch 'master' of ssh://git/srv/git/genome
Revert my revert of 2d47dd95cecde727a2fc0cc9246725b2da42072f