Notice about recurring payments

Author: greydnls

README.md

@@ -38,6 +38,10 @@ The following gateways are provided by this package:
 For general usage instructions, please see the main [Omnipay](https://github.com/thephpleague/omnipay)
 repository.
 
+## Out Of Scope
+
+Omnipay does not cover recurring payments or billing agreements, and so those features are not included in this package. Extensions to this gateway are always welcome. 
+
 ## Support
 
 If you are having general issues with Omnipay, we suggest posting on