Transliterate FTFC into these FontConfig language bindings.

Expose convenience APIs for coercing values & pattern properties to a type.

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.

Bind CSS 'font-stretch' to FontConfig 'width' property, has same scale!

Bind CSS 'font-variation-settings' to FontConfig 'variable' property.

Language bind CSS 'font-feature-settings' to FontConfig's 'fontfeatures'.

Language-bind CSS 'font-weight' to FontConfig 'weight' & CSS 'font-style' to FontConfig 'slant'

Bind FontConfig 'size' to CSS 'font-size', ensure old values get overriden.

Start implementing CSS bindings with font-family, build underlying infrastructure.

Commit FontSet API (seperated out to break import loop).

Fixes to decoding FcFontSets, still experiencing segfaults...

Correct FcType (and in turn FcValue) decoding.