Log Message:
Update to 0.9.16:

Overview of changes leading to 0.9.16
Friday, April 19, 2013
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- Major speedup in OpenType lookup processing.  With the Amiri
  Arabic font, this release is over 3x faster than previous
  release.  All scripts / languages should see this speedup.

- New --num-iterations option for hb-shape / hb-view; useful for
  profiling.