refactor skills and demons

[pickled-dev]

I think I have finally decided I don't like the Key/Value pair format. There's some benefits to it, but at the end of the day. I think having weird methods like Object.keys() and what not makes the code less readable, and just generally more difficult to follow. I'd like to look into just having arrays and adding a name field to the Demon object.

Sure, I might need more functions for getting demon's by name, but I also might not. Maybe I can just use some filter functions to do that instead. I'll need to think about it.