Release v4.0.0

• COMPATIBILIY WARNING!!!! This version removes the existing recipes, attributes, and instance provider in favor of the new
  haproxy_install and haproxy_ configuration resources. Why not just leave them in place?
  Well unfortunately they were utterly broken for anything other than the most trivial usage.
  Rather than continue the user pain we've opted to remove them and point users to a more modern installation method.
  If you need the legacy installation methods simply pin to the 3.0.4 release.
• THIS IS GOING TO BREAK EVERYTHING YOU KNOW AND LOVE
• 12.5 or greater rewrite
• Custom Resource Only, no recipes