rs/SDWebImage — pull request #356 by randallli (2013-04-04 19:36:23+00:00)
Title: added auto release pool in queryDiskCacheForKey

When we make a larger number of calls to retrieve images that are already cached the queryDiskCacheForKey was causing a memory usage spike.
This auto release pool will keep the memory usage for images retrieved from disk down to a minimum.