Add ability to check for weapon damage type and material

Damage type: bludgeon, slashing, piercing

Added ability to check if material == WOOD
Blunt weapons may break if eroded

Metal blunt weapons may break at level 2 or 3 erosion

Wooden weapons may also break at level 1 erosion
Drop penalty for eroded blunt weapons

Blunt weapons do the same amount of damage whether or not they are eroded