Add MongoQueue::count() back in. This has the chance of causing conte…

…ntion on high load queues, but it's still a good utility method to have around.

lib/MongoQueue.php

@@ -66,6 +66,14 @@ public static function hasRunnable($class_name = null, $method_name = null)
 		return ($collection->findOne($query) != null);
 	}
 
+	public static function count()
+	{
+		$collction = self::getCollection();
+
+		$query = array('when' => array('$lte' => time()), 'locked' => null);
+		return $collection->count($query);
+	}
+
 	public static function run($class_name = null, $method_name = null)
 	{
 		$db = self::getDatabase();