Fixed the bugs with the door+key distribution.

![image](https://cloud.githubusercontent.com/assets/1202938/4735637/a3a4a6ee-59e2-11e4-8204-0159f65f052b.png)

Sorry about that; I forgot to remove some debug code for testing the doors (I put them in the first room so I could ensure that I could get to them quickly.) The yellow ovals are keys and the yellow squares are locked doors.