Release changes
- Added GUI debug options #88
- Implemented Porter-Duff composite transformations and blending modes
- Fixed vertical image resize issue when mask is used #86
- Fixed invalid face detection on vertical image resize
- Handling cases when the face detection option is enabled and the resize is not possible without the detected faces being deformed #67
- Fixed pixel to DP conversion issue on retina displays visible when the GUI mode and seams debug option are enabled