README in ezprint-0.2.2 vs README in ezprint-0.3.1

@@ -54,9 +54,30 @@
 
 layout:      false
 template:    the template for the current controller/action
 stylesheets: none
 
+
+Using another PDF processor
+===========================
+
+While ezprint has been designed with PDFKit in mind, other PDF processors
+such as princexml can be used. A princexml processor is included and can be used
+by setting Ezprint.processor = :prince in an initializer.
+
+It's also easy to create your own processor:
+
+module Ezprint
+  module Processors
+    class MyProcessor < Base
+      def self.process(html_string, options = {})
+        # Code to return a PDF string from an html string here.
+      end
+    end
+  end
+end
+
+
 Credits
 =======
 
 Michael Bleigh for writing the awesome princely plugin, which most of the code is reworked from.