Python library to extract VTT (Microsoft Visual TrueType) font hinting data

 A library to:
  - Extract VTT hinting data from a OpenType font prepared with Microsoft Visual
    TrueType (VTT) and store it in a FontTools TTX dump
  - Merge it back from a TTX dump into an OpenType font and
  - Compile the data inside to font to ship it (turn TSI* tables into fpgm,
    etc.).
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 The primary use case is version control of hinting data of fonts.
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 This package installs the library for Python 3.