work

What's important:
- moved some assets from experimental to future (it was long overdue)
- galleries! (experimental, but seems to be useful so far -- able to store interconnected nodes as well, if packed into a subnet)
- new: RBD Active/Xform DOP (activate/deactivate RBD fractures individually using SOP per-point attributes; transforming entire RBD fractured object with an OBJ)