fix readme

Author: kierwils

readme.md

@@ -1,9 +1,12 @@
+### Example
 
 Queues:
+
 	$queue = new Queue\ArrayQueue;
 	$queue->push('some message or json string');
 
 Runner:
+
 	$interval = 10; // seconds
 	$handler = function(string $message) {
 		echo $message.PHP_EOL;