(ps-mule-font-info-database-bdf): The include ASCII

(ps-mule-font-info-database-bdf): The include ASCII
entry and change Latin-1 entry in the default value.
(ps-mule-font-info-database-ps-bdf): New variable.
(ccl-encode-ethio-unicode): Bug of CCL code fixed.
(ps-mule-generate-font): Give CHARSET arg to FONT-FUNC function
registerd in FONT-SPEC.
(ps-mule-bitmap-prologue): Fix PostScript code to realize correct
charcter width of bitmap fonts.
(ps-mule-generate-bitmap-font): Give COLUMNS arg to PostScript
procedure NF.
(ps-begin-file): Output PostScript code for setting
SpaceWidthRatio.
(ps-plot-region): Use line-beginning-position to get a position of
the beginning of the current line.