Add a way to change material properties for different blockstates

Chunky already seems to have some support for this, as evidenced in this image. Here, the blockstate of minecraft:cave_vines_plant (berries=true) has emittance, but minecraft:cave_vines_plant (berries=false) does not.
When one changes the material properties of minecraft:cave_vines_plant , both blockstates receive the change, and there is no way to revert back to having emittance only for the glow berries. After then, either both blockstates are emitters, or both blockstates are not emitters.
Add a way to change material properties for different blockstates.
This may partially fix issue #1062.