Add upstream plugins

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

wp-content/plugins/all-in-one-event-calendar/app/config/exception.php

@@ -0,0 +1,12 @@
+<?php
+/**
+ * This exception is thrown when no constant function is found.
+ *
+ * @author     Time.ly Network Inc.
+ * @since      2.0
+ *
+ * @package    AI1EC
+ * @subpackage AI1EC.Config
+ */
+class Ai1ec_Constants_Not_Set_Exception extends Ai1ec_Exception {
+}