gnome::gsettings: make exec 2.7 compatible.
gnome::gsettings set environment instead of falling back to shell provider.
Merge pull request #1 from mfournier/fix-exec

gnome::gsettings: make exec 2.7 compatible.
Lint gnome::gsettings
Lint gnome::gconf
Merge pull request #2 from mcanevet/lint

Lint
Merge remote-tracking branch 'camptocamp/master' into HEAD
gnome::extension - Allows installing Gnome extensions from third-party repositories.