MugunthKumar/MKStoreKit — pull request #30 by drewjw81 (2011-10-12 14:21:57+00:00)
Title: Proper validation for Auto-renewable subscriptions.

Auto-renewable subscriptions are not being properly validated. I've updated the auto-renew validation to use the the procedures mentioned in
http://developer.apple.com/library/ios/documentation/NetworkingInternet/Conceptual/StoreKitGuide/RenewableSubscriptions/RenewableSubscriptions.html under "Verifying an Auto-renewable Subscription Receipt"

Fixes for issues #20 & #26

Receipt validation will now fail if the status code is not equal to zero.
If an expiration date is present in the receipt it will now be used over the value set in the MKStoreKitConfigs.plist