[hangul] Apply the appropriate *jmo features to decomposed syllables, including Old Hangul sequences that don't have Unicode compositions. Merge clusters in decomposed syllables.
[hangul] Reorder Hangul tone mark to beginning of syllable, unless font implements it using a zero-width glyph.
[unicode] Exclude the Jamo Filler characters from Default_Ignorable, as some fonts want these to be visible/spacing glyphs.
[hangul] Don't force zero-width for marks - this is not wanted for the Jamo Filler glyphs.
[hangul] Fix ordering of dotted circle with Hangul tone mark (reported by Dohyun Kim).
fixup for 64-bit windows build
Merge pull request #13 from jfkthame/hangul-shaper

Tone-mark reordering and improved Old Hangul support
[ot] Don't try to compose if normalization is off
[arabic] Disable 'cswh' by default

I believe Windows 8 disables it, and spec update dated
Jan 2014 also clearly says it's disabled by default:

  http://www.microsoft.com/typography/OpenTypeDev/arabic/intro.htm#features
Fix typo in _hb_buffer_serialize_glyphs_text()

Fixes https://github.com/behdad/harfbuzz/pull/17
Fix clang warning 'private field 'xxx' is not used

Fixes https://github.com/behdad/harfbuzz/pull/16
Make it possible to disable the fallback shaper at configure time

The OT shaper supersedes the fallback shaper in every case
and the latter become an extra weight for 99.9% of users.
Micro optimizations
Fix double destruction in case of OOM
[coretext] Minor optimization
[coretext] Handle surrogate pairs when generating notdef glyphs

Fixes github.com/behdad/harfbuzz/pull/19
Ensure hb_script_t can safely hold any hb_tag_t value it's given.

Fixes https://github.com/behdad/harfbuzz/pull/21
0.9.26
Improve MemoryBarrier() implementation

See thread "[HarfBuzz] compilation error of 0.9.26 with MinGW"
started by Werner.
typo in ucdn's Makefile.am