Added Invoice/SSL download recording, other misc fixes

modules/invoice/classes/Model/Invoice/Memo.php

@@ -0,0 +1,30 @@
+<?php defined('SYSPATH') or die('No direct access allowed.');
+
+/**
+ * This class supports Invoice Memos.
+ *
+ * @package    Invoice
+ * @category   Models
+ * @author     Deon George
+ * @copyright  (c) 2009-2013 Open Source Billing
+ * @license    http://dev.osbill.net/license.html
+ */
+class Model_Invoice_Memo extends ORM_OSB {
+	// Relationships
+	protected $_belongs_to = array(
+		'invoice'=>array(),
+	);
+	protected $_has_one = array(
+		'account'=>array('foreign_key'=>'id'),
+	);
+
+	/**
+	 * Filters used to format the display of values into friendlier values
+	 */
+	protected $_display_filters = array(
+		'date_orig'=>array(
+			array('Config::datetime',array(':value')),
+		),
+	);
+}
+?>