Release 1.2

Changes since v1.1

• Fix issues reported by pyflakes.
• Add missing overrides to DerivedStructureAdapter.
• Check site index in StructureAdapter methods.
• Fix extension module initialization for any import order.
• Fix data conversion from non-contiguous NumPy array.
  This fixes invalid results from of fftgtof, fftftog.
• Support array argument to PDFEnvelope, PDFBaseline.
• Expose the new class registry methods, _deregisterType,
  _aliasType, isRegisteredType, and getAliasedTypes.
• Deregister any Python-extended prototypes on exit.
• Wrap custom valence functions in BVParametersTable.
• Make project tarball reproducible on Mac OS X.
• Add debug.py script for debugging unit tests.
• Simplify redefinition of user envelopes or baselines.
• Expose new evaluator type "CHECK".
• Make the "OPTIMIZED" evaluator the default one.
• Use the "BASIC" evaluator for parallel calculations.
• Update to NumPy C-API 1.7.
• Change argument order for SFAverage.fromComposition, fromStructure,
  and allow string type name as the sftb argument.
• Add scons variable tool for choosing the compiler.
• Drop support for Python 2.6.
• Upgrade for Python 3.4, 3.5, 3.6 and stay compatible with 2.7.
• Add travis test with Python 3 and homebrew.

Release is also available at https://pypi.python.org/pypi.