Hiroyuki Ito <ZXB01226@nifty.com>

Original sources of gif.c and xbm.c are io-gif.c and io-xbm.c
respectively, included in gdk-pixbuf-0.22.tar.gz.

Original sources of jpeg.c, pnm.c, xpm.c and tiff.c are loader_jpeg.c,
loader_pnm.c, loader_xpm.c and loader_tiff.c respectively, included in
imlib2-1.0.6.tar.gz
