Lossless optimization of png image files, using `pngslim` and other tools.
Program graphics (compiled or included with software):
- Slimmed 1.5 KiB (~1.5 KiB kpacked), average ~24% saving for 4 files.
Documentation only artwork (distributed outside a program):
- Slimmed 28.8 KiB (~26.3 KiB kpacked), average ~33% saving for 23 files.
git-svn-id: svn://kolibrios.org@10022 a494cfbc-eb01-0410-851d-a64ba20cac60
