Lossless optimization of png image files, using `pngslim` and other tools.
Program graphics (compiled or included with software):
- Slimmed 3.6 KiB (~3.6 KiB kpacked), average ~29% saving for 6 files.
Documentation only artwork (distributed outside a program):
- Slimmed 45.7 KiB (~33 KiB kpacked), average ~38% saving for 28 files.
git-svn-id: svn://kolibrios.org@10027 a494cfbc-eb01-0410-851d-a64ba20cac60
