Cleanup

Removed the README boilerplate in cookbooks, added
cookbooks/* to the .gitignore file as each cookbook
is a separate repo, and added a .gitkeep to cookbooks/
to ensure the directory stays
Added some more tooling and a role

Added the central_logger role that will be used to set
up a central logging server.

Added the checkout_cookbooks command that can check out
all git repositories in the hedtek-infra organisation
into the cookbooks/ directory