formatDate for ISO8601 ('u') should include timezone offset
formatDate for ISO8601 ('u') should include timezone offset

see https://code.google.com/p/fullcalendar/issues/detail?id=783

Signed-off-by: Laurent Arnoud <f1b010126f61b5c59e7d5eb42c5c68f6105c5914@spkdev.net>

shakaman/resa,shakaman/resa