HFST version 3.9.0 released

• Implement a new Python API

• Add option --time-cutoff to hfst-lookup

• Remove option --minimizeFlags from hfst-lexc and minimize flags by default, add option --alignStrings

• Add support for controlling input and output streams in xre, xfst and lexc compilers

• Update foma back-end

• Improve handling of negative weights, check for epsilon cycles with negative weights and issue a warning, if needed

• Improvements and bug fixes to hfst-optimized-lookup, hfst-proc2, hfst-proc and hfst-pmatch

• Reduce memory leaks when using hfst-ol format

• Support flag diacritics in replace rules

• Rewrite markup rules

• Make command line tools perform automatic conversion when processing transducers whose types differ