[UPDATED] Change TestFlight preprocessor toggles to
TESTFLIGHT_SDK_VERSION.
[IMPROVED] Change logic behind shared MPAppDelegate to inheritance,
allowing for the common files to implement methods that the
platform-specific class can override.
[IMPROVED] Handling and checking of config changes.
[ADDED] iCloud config toggle, allowing a user to turn on and off
the iCloud store.
[IMPROVED] Explanation of iCloud.
[UPDATED] Check TARGET_OS_IPHONE instead of
__IPHONE_OS_VERSION_MIN_REQUIRED.
[UPDATED] A few TestFlight checkpoints names have been updated.
[ADDED] A few new TestFlight checkpoints for new features.
[ADDED] Warn the user when he's not using iCloud and allow him to
switch back to iCloud.
[UPDATED] Moved shared MPAppDelegate code into separate files
depending on the code's responsibility.
[UPDATED] iCloud implementation removed in favor of
iCloudStoreManager's managed implementation.
[FIXED] iCloud configuration made AppStore friendly.
