Shoptap/AFNetworking — pull request #5 by rdignard08 (2014-11-23 04:58:00+00:00)
Title: Clean up some bits of UIImageView+AFNetworking.m

The largest change was setting the underlying dispatch queue to not be the main thread, which should help make the UI feel buttery smooth.

Additionally:
1. `-[NSMutableDictionary setValue:forKey:]` can handle the value being `nil` unlike `-setObject...`
2. The static const char* keys seem needlessly verbose considering these are internal to the class(es) anyway
3. I moved `[[UIImageView af_sharedImageCache] cacheImage:response forKey:key]` to the single standard completion block instead of that call being duplicated multiple times (and thus called multiple times)
4. Lines 198/200/204 make use of the weakSelf/strongSelf semantic so that the UIImageView can safely dealloc when appropriate