Merge 'tags/v0.5-971107': doc updated

src/modules/Image/Makefile

src/modules/Image/Makefile.in

src/modules/Image/doc/Image.GIF.html

src/modules/Image/doc/Image.PNM.html

src/modules/Image/doc/Image.colortable.html

src/modules/Image/doc/Image.html

src/modules/Image/doc/Image.image.html

src/modules/Image/doc/illustrations.html

src/modules/Image/mkdoc.pike