"Reference node" orientation mode for anisotropy

Currently, we can specify the anisotropy orientation as "local axis" or "UVW channel" in the Corona Physical Material > Advanced options. This request is to have one more option specifying the anisotropy orientation based on another scene object/dummy, similar to the "reference node space" in the Corona Triplanar map.

The reason is that sometimes anisotropy may come out wrong, for example on objects modeled in different 3D software, and in such cases "local axis" anisotropy will look wrong without a simple way to fix it, and "UVW channel" anisotropy requires setting up a UVW modifier. Picking a reference node would simplify the fixing/troubleshooting process.