title: How to get timezone from time string
body: <p><code>NSDate</code> class doesn't store information about timezones. I have to store <code>NSTimeZone</code> separately. I can't find any way to get timezone from string like: <code>"2015-01-09T00:00:00+02:00"</code> or <code>"2015-01-09T02:00:00Z</code> . Could you help me please?</p>