Add copyright things.

gulpfile.js

@@ -1,3 +1,12 @@
+/*
+ * gulpfile.js
+ * Copyright (c) 2017 thegrumpydictator@gmail.com
+ * This software may be modified and distributed under the terms of the
+ * Creative Commons Attribution-ShareAlike 4.0 International License.
+ *
+ * See the LICENSE file for details.
+ */
+
 const elixir = require('laravel-elixir');
 
 require('laravel-elixir-vue');