Results 3 issues of Marko Banusic

Using callback function fails. Custom function doesn't get parameters passed. You can test with demo callback.

bug

Added Gemius AdOcean Adbuster

Problem arises for users with interfaces with languages other than English. Datepicker uses `strtotime` which only translates English date format (see [docs](http://php.net/manual/en/function.strtotime.php)). Now since translated version of jQuery return translated...