- Places supervisor/daemon/worker under the new Cron class

- Updates endpoints
- Integrates queue worker with MailPoet mailer
- Fixes script activation check logic

lib/Models/SendingQueue.php

@@ -3,8 +3,8 @@ namespace MailPoet\Models;
 
 if(!defined('ABSPATH')) exit;
 
-class Queue extends Model {
-  public static $_table = MP_QUEUES_TABLE;
+class SendingQueue extends Model {
+  public static $_table = MP_SENDING_QUEUE_TABLE;
 
   function __construct() {
     parent::__construct();