Move BMP library to common fmt dir, update DOS display programs.
Add demonstration code on how to display bitmaps in Windows 3.0/3.1/9x.
Make zip4dos run on both Linux and on MS-DOS, add MS-DOS wildcard matching if compiled as DOS so you can zip *.exe if you like. GNU iconv is not available for DOS, of course. Real-mode memory limitations and memory model limitations apply.