Update copyright stuff [skip ci]

database/seeds/TransactionCurrencySeeder.php

@@ -1,4 +1,24 @@
 <?php
+/**
+ * TransactionCurrencySeeder.php
+ * Copyright (c) 2017 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 declare(strict_types=1);
 
 use FireflyIII\Models\TransactionCurrency;