- Add glib GBoxedType stuff and introspection
-- Finish Uniscribe / CoreText face / font get API
-
- BCP 47 language handling / API (language_matches?)
-- Add hb_face_get_glyph_count()?
-
- Add hb_font_create_linear()?
-- Add hb_shape_plan()/hb_shape_planned()
-
- Add query API for aalt-like features?
- SFNT api? get_num_faces? get_table_tags? (there's something in stash)
- --output-format should list available formats.
- Add --width, --height, --auto-size, --align, etc?
-- Add XML and JSON formats to hb-shape
- --features="init=medi=isol=fina=0"