Support for animated png files. Both apng and png files with animation can be viewed. Cleaned up and updated image-loading and Tacent libraries. New features and improvements include:
- Transparent work-area restores properly on Linux.
- Updated to Tacent V 0.8.2
- Fixed tga mimtype specification.
- Updated LibPNG to V 1..6.37
- Updated ZLib to V 1.2.11
- APng support via ApngDis V 2.9