Add set image UIButton extension methods
Merge branch 'master' into feature/button_image
Add button image format
Merge branch 'master' into feature/button_image
Add set image tests
Arrange cancel image tests properly
Define a UIView extension for UIKitGlobals and add a backgroundImageFetcherKey
Move hnk_formatWithSize to UIView extension
Refactor after pr reviews
Merge pull request #102 from Haneke/feature/button_image

Feature/button image, closes #79 #81
Bug fix: formats used the same disk path with different queues.
Merge pull request #106 from Haneke/bug/disk-cache/wrong-name

Bug fix: formats used the same disk path with different queues.
Format.isIdentity

Used to skip applying the format in a background queue.
Cache.set applies format and returns result in success closure
Remove ;
thing > value
Add setImageFromFile on UIImageView extension
Add setImageFromFile tests on UIImageView extension tests
Stop using ! accessors in tests to prevent crashes
Merge pull request #108 from Haneke/feature/image_from_path

Feature/image from path, closes #54