Handle form feed better when ps-zebra-stripe-follow is

Handle form feed better when ps-zebra-stripe-follow is
non-nil.  Adding almost all customization variables on ps-setup.  Doc
Fix.
(ps-print-version): New version number (6.3.3).
(ps-end-with-control-d): Initialization fix.
(ps-lines-printed): New var.
(ps-skip-newline): New fun.
(ps-setup, ps-prologue-file, ps-begin-job, ps-begin-page)
(ps-next-line, ps-continue-line, ps-plot-region)
(ps-generate-postscript-with-faces, ps-end-job): Code fix.