- fix smoothfaces specification for animated tiles
- smoothfaces is the *only* attribute that could exist
  multiple times. this is not supported by Crossfire.pm.
- smooth information and level is obviousaly *per face*, not
  per archetype, reinforcing the view that this info should
  not be in the archetypes at all.
- until this has been fixed, crossfire 2.x servers require
  a single smoothface per archetype with possibly multiple
  face => smooth values, and requires that smoothlevel values
  must be consistent for all archetypes.