v0.5.0-a3

Added

• Additional score matrices using the data files from Opal.

Changed

• Avoid temporary data copy in Database._encode.
• Move Cython and Opal headers inside package to allow Cython import in other extensions.
• Make Database use mostly the pointer array to make the algorithms more generic over the storage class.
• Make MAX_ALPHABET_SIZE a constant of pyopal.lib rather than a user-defined macro for compatibility in other extensions.

Fixed

• ScoreMatrix buffer-protocol not returning a read-only buffer.
• Database.mask accessing out-of-bound elements when building pointer array.
• Broken detection of PyInterpreterState_GetID in setup.py.