Lossless optimization of png image files, using `pngslim` and other tools.
Program graphics (compiled or included with software):
- Slimmed 28.7 KiB (~28.5 KiB kpacked), average ~19% saving for 13 files.
Documentation only artwork (distributed outside of a program):
- Slimmed 100 KiB (~91 KiB kpacked), average ~38% saving for 27 files.
git-svn-id: svn://kolibrios.org@10031 a494cfbc-eb01-0410-851d-a64ba20cac60
