* font/font.c: Include `ascii.h'.
(ASCII_BITMAP_SIZE): New macro.
(ascii_font_glyph): Define.
(ascii_glyph_lookup): New function.
(grub_font_get_string_width): Change comment. If glyph not found, use
ascii_glyph_lookup.
(grub_font_get_glyph_with_fallback): If glyph not available returns
ascii_glyph_lookup.
* util/grub-mkfont.c (file_formats): New enum.
(options): Add `ascii-bitmaps' new option.
(usage): Add `asii-bitmaps' new option.
(write_font_ascii_bitmap): New function.
(write_font): Rename to ...
(write_font_p2): ... this. Remove print_glyphs call.
(main): Use file_format. Implement code for ranges if ascii-bitmaps is
used. Call print_glyphs.
* Makefile.in (pkgdata_DATA): Add `font/ascii.h'.
