Log Message:
Update to 0.9.41

Changelog:
Overview of changes leading to 0.9.41
Thursday, June 18, 2015
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- Fix hb-coretext with trailing whitespace in right-to-left.
- New API: hb_buffer_reverse_range().
- Allow implementing atomic ops in config.h.
- Fix hb_language_t in language bindings.
- Misc fixes.