Update poll.js

public/js/poll.js

@@ -1,3 +1,10 @@
+/**
+ * This file is part of the ForkBB <https://github.com/forkbb>.
+ *
+ * @copyright (c) Visman <mio.visman@yandex.ru, https://github.com/MioVisman>
+ * @license   The MIT License (MIT)
+ */
+
 if (typeof ForkBB === "undefined" || !ForkBB) {
     var ForkBB = {};
 }