code: def recipient_pipeline(caller_reference, return_url, options = {})
        cbui Recipient.new(options.merge(:caller_reference => caller_reference, :return_url => return_url))
      end
docs: Creates a pipeline that will authorize you to send money _to_ the user.
  
   See http://docs.amazonwebservices.com/AmazonFPS/latest/FPSAdvancedGuide/CBUIapiMerchant.html