iOS: Remove all usage of -[UIDevice uniqueIdentifier]; iTunes URLs are displayed in a native StoreKit browser on iOS 6 devices; Interstitial custom events can report click events
iOS: Added data signals (location accuracy, bundle version, connectivity type) to ad requests; added session tracking; SDK now requires SystemConfiguration.framework
Fixed crashing bug when user dismisses a modal after a banner ad has refreshed
Merge branch 'master' of git://github.com/mopub/mopub-client
- Updated the Android Support library to v13.

Signed-off-by: Carlos Sobrinho <carlos.sobrinho@motain.de>