Add a constructor of competitors

Add an editor to make your own opponents with the names you wish, AI persona you wish and appearance you wish.

I don't want to play against personas with strange names like Koiny5Fpm58 or BrotherDrainer666 or trying to find a persona with normal name, normal view and normal abilities. I want to make an opponent by my own and to play against Elizabeth I or Ghenghis Khan, that I've created by myself.