Release 0.13.0

Performance

• use faster bitparallel implementations for distance and ratio
• avoid string copies in distance, ratio and hamming

Fixed

• Fix usage of deprecated Unicode APIs in distance, ratio and hamming
• Fixed incorrect window size inside Jaro and Jaro-Winkler implementation
• Fixed incorrect exception messages
• Fixed multiple bugs which prevented the use as C library, since some functions
  only got defined when compiling for Python
• Fixed incorrect allocation size in lev_editops_matching_blocks and
  lev_opcodes_matching_blocks

Changed

• Maintainership passed to Max Bachmann
• Removed unused functions and compiler specific hacks
• Split the Python and C implementations to simplify building of
  the C library
• Build and deliver python wheels for the library