Add support for Spanish [skip ci]

resources/lang/es_ES/passwords.php

@@ -0,0 +1,30 @@
+<?php
+/**
+ * passwords.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);
+
+return [
+    'password' => 'Las contraseñas deben tener al menos seis caracteres y coincidir entre sí.',
+    'user'     => 'No podemos encontrar un usuario con esa dirección de correo electrónico.',
+    'token'    => 'Este token para reestablecer la contraseña no es válido.',
+    'sent'     => 'Te enviamos un correo con el link para reestablecer tu contraseña!',
+    'reset'    => 'Tu contraseña fue reestablecida!',
+    'blocked'  => 'Buen intento.',
+];