* wl-demo.el (wl-demo-insert-image): Use :file instead of :data to

* wl-demo.el (wl-demo-insert-image): Use :file instead of :data to
 make an xbm image on XEmacs; use wl-highlight-demo-face instead of
 wl-highlight-logo-face to set the bg color of an xbm image; fixed
 the way to measure the width of a bitmap image; don't put face on
 ascii and bitmap images; put the mark which should not use the
 variable-pitch face on ascii and bitmap images.
(wl-demo-setup-properties): Don't use the variable-pitch face on
 ascii and bitmap images; made it work on Emacs 20 and earlier.
(wl-demo-insert-text): End with a newline at the bottom; don't put
 face on text.

* wl-highlight.el (wl-highlight-logo-face): Specified bg colors.