Document FcFontSet language bindings.

Fix remaining segfaults.

Catch one FcFontSet segfault.

Parse src property for @font-face into custom FontConfig property.

Parse unicode-range property for @font-face.

Parse font-variation-settings property for @font-face.

Parse font-feature-settings for @font-face rules.

Parse font-weight & font-stretch properties for @font-face.

Implement @font-face 'font-family' property.

Define skeleton for parsing @font-face.

Fixes to decoding FcFontSets, still experiencing segfaults...

Final memory-safety fixes & expose public API.

Draft implicit-config versions of fontset APIs.

Refine memory management of FontSets (until I've enabled FcConfig code).

Get FontSet module compiling (need to review memory management responsibilities).

First!