Merge pull request #552 from HartS/5.x

README.md

@@ -208,7 +208,7 @@ sock.subscribe('kitty cats');
 console.log('Subscriber connected to port 3000');
 
 sock.on('message', function(topic, message) {
-  console.log('received a message related to:', topic, 'containing message:', message);
+  console.log('received a message related to:', topic.toString(), 'containing message:', message.toString());
 });
 ```