SwissQR: add Sprain\SwissQrBill and dependencies

htdocs/includes/symfony/intl/Exception/ExceptionInterface.php

@@ -0,0 +1,21 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Intl\Exception;
+
+/**
+ * Base ExceptionInterface for the Intl component.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+interface ExceptionInterface extends \Throwable
+{
+}