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
Remove failure block param on hnk_setImage and hnk_setBackgroundImage UIButton extension methods
Merge branch 'master' into improvement/hnk_setImage_failure_block

Conflicts:
	Haneke/UIImageView+Haneke.swift