Fix win32 testing
[otlayout] Reset ccc when marking glyph as letter
Bug 70971 - Signed/unsigned compiler warnings on windows

Patch from Emil Eklund.
[otlayout] Remove unused is_inplace()

Patch from Jonathan Kew.
Fix llvm warnings on Mac

Patch from Scott Fleischman.  Warnings were:

harfbuzz/src/hb-font-private.hh:121:42: Implicit conversion loses
integer precision: 'long long' to 'hb_position_t' (aka 'int')
harfbuzz/src/hb-font-private.hh:126:42: Implicit conversion loses
integer precision: 'long long' to 'hb_position_t' (aka 'int')
harfbuzz/src/hb-font-private.hh:400:85: Implicit conversion loses
integer precision: 'long long' to 'hb_position_t' (aka 'int')
harfbuzz/src/hb-ot-layout-common-private.hh:1115:37: Implicit conversion
loses integer precision: 'long long' to 'int'
harfbuzz/src/hb-ft.cc:421:97: Implicit conversion loses integer
precision: 'unsigned long long' to 'int'
harfbuzz/src/hb-ft.cc:422:97: Implicit conversion loses integer
precision: 'unsigned long long' to 'int'
[travis] Enable graphite2
Fix scratch-buffer alignment warnings
[coretext] More scratch buffer fixes
More scratch-buffer cleanup
Use long alignment for scratch buffer

Fixes last of scratch alignment warnings in hb-coretext.
0.9.24
Merge tag 'tags/0.9.24'

0.9.24

# gpg: error loading `iconv.dll': The specified module could not be found.
#
# gpg: please see http://www.gnupg.org/download/iconv.html for more information
# gpg: keyblock resource `c:/Users/Matt/.gnupg\pubring.gpg': file open error
# gpg: Signature made 11/14/13 06:54:16 using DSA key ID D3531115
# gpg: Can't check signature: public key not found