Floorscope

I've added a little tweak to Room to put a Room's floor in scope even during the dark. You still can't examine the ground without light (which seems fair enough), but when you try you get "It's too dark to see" rather than "You see no floor here", which seems to me to be a better response, and the game will accept DROP BALL ON GROUND in the dark, which is much better than getting "You see no ground here."

Try it out and let me know if you're happy with it.