
* `moreblocks.api.register_all_faces(itemstring, base, [redef])`
  Register an "All Faces" variant of a tree.

* `moreblocks.api.register_no_faces(itemstring, base, [redef])`
  Register a "No Faces" variant of a tree.

* `moreblocks.api.register_trap(itemstring, base, [redef])`
  Register a "Trap" variant of a node. A trap variant is a non-solid node that looks like the original.
