• Shape joining scripts other than Arabic/Syriac using the Universal Shaping Engine.
  Previously these were shaped using the generalized Arabic shaper. (David Corbett)
• Fix regression in shaping of U+0B55 ORIYA SIGN OVERLINE. (David Corbett)
• Update language tags. (David Corbett)
• Variations: reduce error: do not round each interpolated delta. (Just van Rossum)
• Documentation improvements. (Khaled Hosny, Nathan Willis)
• Subsetter improvements: subsets most, if not all, lookup types now. (Garret Rieger, Qunxin Liu)
• Fuzzer-found fixes and other improvements when memory failures happen. (Behdad)
• Removed most atomic implementations now that we have C++11 atomic impl. (Behdad)
• General codebase upkeep; using more C++11 features: constexpr constructors, etc. (Behdad)