Add an optional paniclog file, controlled by a new PANICLOG macro that can
be used to log all panic and impossible messages. Helpful when people
forget to send, or didn't see, the message.
Fix a minor cloning problem; clones didn't retain the monster's name or
tameness. (The name *was* retained if you were cloned.) I also added a
minor change in wizard mode to display a few tameness fields of a dog.
