Propagate bugfixes to Harfbuzz-Pure.

Document everything and get test code working again!

Integrate richtext APIs.

Add nicer API for specifying font features!

Fix compilation issues with restructure back to Typograffiti's original.

Fix text rendering.

Incoporate explicit shaders, some GPU drivers require this.

Incoporate Harfbuzz layout input.

Init (Transliterated from Gelatin to raw OpenGL with Harfbuzz glyphs).