Log Message:
Update to 0.9.38:

Overview of changes leading to 0.9.38
Friday, January 23, 2015
=====================================

- Fix minor out-of-bounds access in Indic shaper.
- Change New Tai Lue shaping engine from South-East Asian to default,
  reflecting change in Unicode encoding model.
- Add hb-shape --font-size.  Can take up to two numbers for separate
  x / y size.
- Fix CoreText and FreeType scale issues with negative scales.
- Reject blobs larger than 2GB.  This might break some icu-le-hb clients
  that need security fixes.  See:
  http://www.icu-project.org/trac/ticket/11450
- Avoid accessing font tables during face destruction, in casce rogue
  clients released face data already.
- Fix up gobject-introspection a bit.  Python bindings kinda working.
  See README.python.
- Misc fixes.
- API additions:
  hb_ft_face_create_referenced()
  hb_ft_font_create_referenced()