Face Rigs - Add support for bone face rigs

[Haï~]

[pleaserespond]

This would be very useful, I recently ran into this limitation when trying to work on a model. I can work around by creating shape keys in Blender, but being able to use the armature would be really nice. I don't need full face rig controls in the extension, just being able to select pre-existing animations of face bones would be enough.
The big benefit for me would be the ability to layer other facial bone animations on top of the expressions without them looking weird as they do when combining bone animations and shape keys.