src/pfr/pfrgload.c, src/pfr/pfrobjs.c, src/pfr/pfrtypes.h,
Jamfile, src/base/ftobjs.c: adding support for embedded bitmaps to
the PFR driver, and rewriting its kerning loader / handler to use all
kerning pairs in a physical font (and not just the first item).
* src/tools/docmaker/content.py, src/tools/docmaker/sources.py,
src/tools/docmaker/tohtml.py: fixing a few nasty bugs
* src/sfnt/ttcmap0.c: the validator for format 4 sub-tables is
now capable of dealing with invalid "length" fields at the start
of the sub-table. This allows fonts like "mg______.ttf" (i.e.
Marriage) to return accurate charmaps.