include readme documentation on how to use cfg_update_action
include readme documentation on how to use cfg_update_action

voleoo/chef-postgresql,phlipper/chef-postgresql,rmoriz/chef-postgresql,voleoo/chef-postgresql,engineyard-cookbooks/postgresql,zendesk/chef-postgresql,phlipper/chef-postgresql,zendesk/chef-postgresql,engineyard-cookbooks/postgresql,rmoriz/chef-postgresql