Some comment and doc fixes.

Some comment and doc fixes.
(ps-print-version): New version number (3.05.1).
(ps-adobe-tag): Replace defvar by defcustom, and doc fix.
(ps-print-with-faces, ps-print-without-faces)
(ps-spool-with-faces, ps-spool-without-faces): Add arg REGION-P.
(ps-print-region-with-faces, ps-print-region)
(ps-spool-region, ps-spool-region-with-faces): Fix calls to
the functions above.
(ps-setup): Print value of ps-zebra-stripe, ps-number-of-zebra,
ps-line-number, ps-print-background-image,
and ps-print-background-text.
(ps-print-prologue-1): Bug fix in PostScript programming:
/BeginDSCPage, /BeginPage.
(ps-showpage-count, ps-ref-bold-faces, ps-ref-italic-faces)
(ps-ref-underlined-faces, font-lock-face-attributes)
(ps-initialize-faces): Vars deleted.
(ps-override-list, ps-extension-to-bit-face)
(ps-extension-to-screen-face, ps-initialize-faces, ps-header-height)
(ps-hard-lf, ps-soft-lf, ps-get-face, ps-map-font-lock): Fn deleted.
(ps-extend-face-list, ps-extend-face): Doc fix.
(ps-print-face-alist): New var to handle face alist.
(ps-printing-region): New var and fn.
(ps-header-page, ps-set-face-bold, ps-set-face-italic)
(ps-set-face-underline, ps-set-face-attribute, ps-map-face): New fn.
(ps-rmail-mode-hook, ps-rmail-print-message-from-summary)
(ps-print-message-from-summary, ps-vm-print-message-from-summary):
Fns moved.
(ps-background): New argument PAGE-NUMBER.
(ps-begin-file): Bug fix and print proper line number in a region.
(ps-begin-page): Call ps-header-page.
(ps-get-buffer-name): Indicates in the header when printing a region.
(ps-end-page): Delete ps-showpage-count.
(ps-dummy-page): Calls ps-header-page.
(ps-set-color): Programming improvement.
(ps-plot-region): Doc fix.
(ps-face-attributes): Same functionality as deleted ps-get-face.
(ps-build-reference-face-lists): Do the job by calling
ps-set-face-bold and ps-bold-faces, and friends.