Add formulae for Zork 1-3

These formulae were originally created by @wjwwood. I'm simply adding them to this repo for him (see [our discussion on his homebrew-zork tap](https://github.com/wjwwood/homebrew-zork/issues/1)).

Also, I have included his formula for jzip, a dependency of his Zork 1-3 formulae. Let me know if that formula is supposed to go somewhere else (since it's not a game, it's a dependency of one).