make ps-print-buffer-with-faces all bold

[myglc2]

I alway want emacs printout in color but find the 'normal' faces
frustratingly unreadable, especially in low contrast colors. So...  Here
is how to make everything bold in ps-print-buffer-with-faces, etc.

;; ps-print in all bold fonts
(ps-extend-face-list
 (mapcar (function  (lambda (x) (list x
                                      (face-attribute x :foreground)     
                                      (face-attribute x :background)
                                      'bold)))
         (face-list)) 'MERGE)