Dungeon assignment correction

I had originally stated that your Dungeon file for the extra credit assignment was to be a Zork-III-compatible dungeon. I meant, of course, a Zork++-standard-features-compatible dungeon — i.e., the .zork file should have “Zork++” on the second line, and it should include standard events in some of the item-specific commands.

Thanks to Brooke for pointing out my error.