- Modifies cron router/UI to display proper status message when WP task

scheduler is configured and cron is not running
- Updates sending queue worker and related components to stop (delete)
  cron when all processing is done

lib/Models/Setting.php

@@ -160,4 +160,13 @@ class Setting extends Model {
 
     return $setting->save();
   }
-}
+
+  public static function getSetting($setting) {
+    return self::where('name', $setting)->findOne();
+  }
+
+  public static function deleteSetting($setting) {
+    $setting = self::where('name', $setting)->findOne();
+    return ($setting) ? $setting->delete() : false;
+  }
+}