When I added the font.lazy setting, I made glyf table non-lazy
by default. This is helpful to users who typically access glyphs
like:
glyf_table.glyphs[glyfname]
instead of the correct way:
glyf_table[glyfname]
and also forget to call expand() on the glyph. However, this
significantly slows down most scripts that load the font without
lazy=True... As such, add a third mode to laziness. By default
lazy=None and does NOT expand glyphs. If lazy=False is passed
in, all glyphs are loaded.
I hope this is an acceptable middle ground and not too confusing.
e6adebdc4a