Log Message:
Update to 0.9.29:

Overview of changes leading to 0.9.29
Thursday, May 29, 2014
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- Implement cmap in hb-ot-font.h.  No variation-selectors yet.
- Myanmar: Allow MedialYa+Asat.
- Various Indic fixes:
  * Support most characters in Extended Devanagary and Vedic
    Unicode blocks.
  * Allow digits and a some punctuation as consonant placeholders.
- Build fixes.