Fix spooled file bugs.

Fix spooled file bugs.
(ps-print-version): New version number (3.06.3) and doc fix.
(ps-page-postscript): New var.
(ps-begin-file): Initialize PostScript page number,
eliminate total page and line number.
(ps-begin-job): Eliminate PostScript Trailer section on spooled buffer,
initialize total page and line number.
(ps-end-file): Use PostScript page number.
(ps-header-page): Adjust header page.
(ps-generate): Adjust page and line count setting.
(ps-do-despool): Eliminate PostScript Trailer section setting.

(ps-generate): Call set-buffer-multibyte.