added initial support for service binding

ServiceBinding/RpcLiteralResponseMessageBinder.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Bundle\WebServiceBundle\ServiceBinding;
+
+use Bundle\WebServiceBundle\ServiceDefinition\Method;
+
+class RpcLiteralResponseMessageBinder implements MessageBinderInterface
+{
+    public function processMessage(Method $messageDefinition, $message)
+    {
+        return $message;
+    }
+}