added initial support for service binding

ServiceBinding/MessageBinderInterface.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Bundle\WebServiceBundle\ServiceBinding;
+
+use Bundle\WebServiceBundle\ServiceDefinition\Method;
+
+interface MessageBinderInterface
+{
+    /**
+     *
+     *
+     * @param Method $messageDefinition
+     * @param mixed $message
+     *
+     * @return mixed
+     */
+    function processMessage(Method $messageDefinition, $message);
+}