Add git-guppy to the GulpJS website
Add git-guppy to the GulpJS website

Add git-guppy to the list of plugins on http://gulpjs.com/plugins/ by
adding the gulpplugin-tag, as described in
https://github.com/gulpjs/plugins/blob/master/README.md.

lucasconstantino/git-guppy,therealklanni/git-guppy