Testing sword!

This is a new weapon for testing damage changes. It always does default 10 damage, plus whatever is added by the skill proficiency (base damage can be changed in item properties). The sword's proficiency and weapon damage type can be modified separately via the instructions in the item's description. 

The object properties window can also be used to change the sword's range, disarm bonus and spell modifier in addition to base damage. I'm open to adding more features if requested.

I've also added the item (and cow mask, which was missing) to system.kod so they can be retrieved via dm commands.