Make CHANGELOG Stove-compatible, add missing entries
Use HTTPS for Berkshelf API server
Clean up ignore files, remove Vagrantfile (using Test Kitchen)
Remove unneeded config files for TK testing

Use paths to data_bags & environments in main Chef repo instead of these
Use Berkshelf 3, add testing setup, Rubocop config, Rakefile
Clean up Test Kitchen config

* Use paths to main Chef repo data_bags & envs
* Use `dev` environment
Fix FC019: Access node attributes in a consistent manner
Fix FC002: Avoid string interpolation where not required
Rubocop fix: Use snake_case for source file names
Rubocop fix: Use _k as argument name to indicate it won't be used
Use GitHub as source for stale-node-checker v1.0.2

Update to newer stale-node-checker & ensure Berkshelf works properly
Remove unnecessary Gem
Use correct location & sane version for Berkshelf-API cookbook
Use path instead of GitHub to load up berkshelf-api cookbook

This _absolutely_ requires that you have the berkshelf-api repo cloned
to be a sibling to this cookbook in your cookbooks directory.

Janky, but the git & rel method of trying to load this cookbook doesn't
work. See berkshelf/berkshelf-api#126 for details.
Fix up recipes/attributes to work w/ berkshelf_api cookbook

Significantly changed from the old berkshelf cookbook
Add header to probymonitor recipe
Write ChefSpec tests, all pass!