Replacing a couple of NSLog calls
Added integration with Amazon Web Services (AWS)
Fixes IOS-461
Added integration with Amazon Web Services' Simple Notification Service.
Fixes IOS-461
Added `utc_offset` to device info.
Fixes IOS-466.
Added individual docstrings for the 3rd-party integration methods.
Fixes #91 ATAppConfigurationUpdateTask needs to retain self before updating task state
Fixes #90 ATLogger fails to catch exception if no space left on device
Renamed Amazon SNS integration method and key.
Added Amazon SNS integration to the readme.
IOS-461
apptentive-ios v1.4.2 release