switch from cron service to schedule puppet type

README.md

REFERENCE.md

manifests/core.pp

manifests/core/install.pp

manifests/core/update.pp

manifests/external_fact.pp

manifests/init.pp

manifests/resource/activate.pp

manifests/resource/install.pp

manifests/resource/uninstall.pp

manifests/resource/update.pp

spec/acceptance/wordpress_spec.rb

spec/spec_helper_acceptance.rb

templates/external_fact_wordpress.rb.erb