- Refactors Mailer class

- Refactors SendingQueue worker class
- Adds Maier router with a send() method + ability to specify sending method
- Updates tests
- Introduces 'stopping' and 'starting' cron states
- Improves cron control mechanism
Closes #276

lib/Models/SendingQueue.php

@@ -4,7 +4,7 @@ namespace MailPoet\Models;
 if(!defined('ABSPATH')) exit;
 
 class SendingQueue extends Model {
-  public static $_table = MP_SENDING_QUEUE_TABLE;
+  public static $_table = MP_SENDING_QUEUES_TABLE;
 
   function __construct() {
     parent::__construct();