Memorial file upon character death

This pull request contains an option much like the world deletion (0 = never, 1 = always, 2 = query) to write a memorial file of a character after they die. It's a simple .txt file in a /memorial folder populated with information pulled mostly from the player class, but a few other places too.

There's plenty there right now, but I'm hoping to hear some feedback on other things that  could be added. In particular, noting the cause of death would be great, but more complicated than I'd like to get into with this PR.

I was mostly concerned with getting all the information someone might want about their character gathered up; others are free to make the output file prettier.