3.0.3

Merged pull requests

• Expose image fetch cancelling #72, by VladislavJevremovic
• Carthage compatibility #73, by vincentsaluzzo
• fix typo in documentation #75, by alexshepard
• Customise cache and downloader #76, by onmyway133

🤘 Closed issues

• Does the library support the usage of an authorization header? #74