added my copyrights

js/show-op.js

@@ -6,6 +6,7 @@
  *
  * Released under the MIT license
  * Copyright (c) 2012 Michael Save <savetheinternet@tinyboard.org>
+ * Copyright (c) 2014 Marcin Łabanowski <marcin@6irc.net>
  *
  * Usage:
  *   $config['additional_javascript'][] = 'js/jquery.min.js';