extended the palette system~ wwww

extended the palette system~ wwww

wwww
	modified:   data/MAYU.PCX
	new file:   data/g.pal
	modified:   data/koishi^^.pcx
	modified:   data/koishi~.pcx
	modified:   data/ptmp.pcx
	modified:   pcxtest.exe
	modified:   scroll.exe
	modified:   src/lib/bitmap.h
	modified:   src/lib/mapread.c
	modified:   src/lib/mapread.h
	modified:   src/lib/modex16.c
	modified:   src/lib/modex16.h
	modified:   src/pcxtest.c
	modified:   src/scroll.c
	modified:   test.exe
	modified:   test2.exe