Update for ARC compliance
Add image fetch method with completion block
Add serial queue for downloading
Add notifications for download start/stop
Switch to concurrent queue
Fix merge conflicts
Fix merge conflicts
Merge pull request #13 from jaminguy/master

Move image loading to a background and fix potential retain cycle bug
show placeholder if downloaded data is not an image
new pod spec file so we can add it as a private pod. wip
updating podspec file
Merge pull request #14 from antoinerabanes/master

show placeholder if downloaded data is not an image
Fixing .podspec file.
Bumping versionto 0.0.4
Ugh bumping version for Cocoapods.
Call removeObjectForKey: on ourselves instead of super to accomplish removing from disk as well as in-memory cache. Fixes #15.
Added Default images to Demo app. Improved image loading behavior. Added a note about the call to removeAllObjects in the init method of DemoViewController.
More cleanup, removing DemoTableViewCell and updating .podspec file.
adding completion block to UIImageView category
Merge pull request #16 from atomkirk/master

Added completion block to UIImageView category