new autopkg and munki related roles and improvements

new!
autopkg_install to install autopkg
autopkg_repo to repo-add recipe repos
autopkg_run to run a list
munki_iconimport to d/l and run munki's iconimporter
munki_manifest to run manifestutil add-pkg

improved!
munki ==> munkitools
munki_repo

trying to use role/foo/README.md to note requirements and playbook usage.