Create UIButton extension and setBackgroundImage and setBackgroundImageFromURL methods
Merge branch 'master' into feature/button_background_image
Add setBackgroundImageFromFile method
Start background image tests
Merge branch 'master' into feature/button_background_image
Properly add scale mode
Merge branch 'master' into feature/button_background_image
Add setBackgroundImageFromFetcher tests
Add setBackgroundImage and etBackgroundImageFromURL tests
Add setBackgroundImageFromFile tests
Clean up and add custom format tests
Merge branch 'master' into feature/button_background_image
Update Haneke Global structs accesing
Fix setBackgroundImage test names
Remove state parameter on tests when setting .Normal
Remove redundant addFormat
Merge pull request #97 from Haneke/feature/button_background_image

Feature/button background image, closes #80 and #82