Should upgrade to NSURLSession

[uliwitness]

This still uses NSURLConnection, but turns off the deprecation warnings for it using #pragma. Would be a much better idea to upgrade to using NSURLSession instead.

[uliwitness]

PS - I found this project via your answer to http://stackoverflow.com/questions/6256748/check-if-my-app-has-a-new-version-on-appstore and it was the only answer that wasn't flat-out wrong like most of the others. I'm not actually using this code, or I would have sent you a pull request with the fixes instead of just filing bugs asking you to do it.