Add copyright things.

resources/assets/js/components/transactions/CustomString.vue

@@ -1,3 +1,23 @@
+<!--
+  - CustomString.vue
+  - Copyright (c) 2019 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/>.
+  -->
+
 <template>
     <div class="form-group"
          v-bind:class="{ 'has-error': hasError()}"