[new] devel/git-cinnabar, a git remote helper to talk to hg repos

hi,

hg is so painful and slow.. so here's a port for git-cinnabar, which
allows me to talk to mozilla mercurial servers, but working locally with
git.

https://github.com/glandium/git-cinnabar/wiki/Mozilla:-A-git-workflow-for-Gecko-development

i'm not sure i will be needing it for long given
https://glandium.org/blog/?p=4346, but for now it works and helps !

feedback welcome. oks too :)

Landry