How can I check if the user has allowed location for mu app?
Normally I would use `authorizationStatus` method of the `CLLocationManager` class, but it is only available in iOS 4.2 and newer. Is it possible to achieve this somehow while still using SDK 4.2, so that the app can still run on devices with older versions of iOS, or do I have to downgrade the SDK?
And along the same line, I need a similar alternative for the `locationServicesEnabled` method prior to iOS 4.0.