Express actor's regeneration as a body part
Give some animals armored skin instead of inflated HPs
Add sight, smell and iq aspects
Add strength predicates for the new aspects
Take sight radius from items, not from actor's body
Replace asight with SightRadius
Replace asmell with SmellRadius
Get rid of the IQ actor attribute
Let smarter and larger animals open doors
Make sight and smell radius additive
Make steadfastness and regeneration additive