Document modules.

Improve handling of invalid FontConfig data.

Fuzz test roundtrip conversions between C & Haskell datastructures!

fuzz-test MessagePack implementations.

Constrain public API.

Implement utils for loading queried fonts.

Implement Stylist traits for FontConfig patterns!

Finish initial redraft

Write init/finalize & pattern language bindings, haskell-side!

Datamodel FontConfig in Haskell.