update Gemfile and dependencies
update .gitignore
update working ruby version
add Berksfile
update test infrastructure and support files
update CI configuration
ensure `apt` recipe is included
update `keyserver` to use port 80
style cleanup
bump minimum required debian version
remove version constraint
extract `_apt` recipe
update legacy `npm` recipe, add debian support
add chefspec coverage
update README and LICENSE:

* support notes
* badges
* copyright year
Merge pull request #5 from phlipper/project-updates

Project updates