Also document the static_data_store

README.md

@@ -23,6 +23,7 @@ However, if you want to rely on other roles/management methods to deploy/manage
 This role requires:
 - Ansible 2.0
 - The `dynamic_data_store` variable to be set: see http://ansible-sensu.readthedocs.io/en/latest/dynamic_data/
+- If `sensu_include_plugins` is true (the default), the `static_data_store` variable needs to be set: see http://ansible-sensu.readthedocs.io/en/latest/dynamic_checks/
 
 ## Supported Platforms
 ### Current Release