AFNetworking/AFNetworking — pull request #984 by robertmryan (2013-05-10 04:53:11+00:00)
Title: Handle UIApplicationDidReceiveMemoryWarningNotification in UIImageView+AFNetworking

I've modified `UIImage+AFNetworking.m` so that it now has `init` method that adds itself as an observer for `UIApplicationDidReceiveMemoryWarningNotification`, and if it receives such a low memory warning, it will purge the cache.