added danish translation

resources/lang/da/setup.php

@@ -0,0 +1,23 @@
+<?php
+
+/*
+ * This file is part of Cachet.
+ *
+ * (c) Alt Three Services Limited
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+return [
+    'setup'             => 'Opsætning',
+    'title'             => 'Cachet opsætning',
+    'service_details'   => 'Service detaljer',
+    'env_setup'         => 'Opsægning af miljø',
+    'status_page_setup' => 'Statusside setup',
+    'show_support'      => 'Vis Cachet support?',
+    'admin_account'     => 'Administratorkonto',
+    'complete_setup'    => 'Gennemfør opsætning',
+    'completed'         => 'Cachet er nu sat op og er klar til brug!',
+    'finish_setup'      => 'Gå til oversigtssiden',
+];