Refactoring of existing cheats (see #1679)

[kubaau]

First few commits from PR #1679 :

• refactors existing cheat code ("winter" code, toggle human AI player, armageddon) into new Cheats and CheatCommandTracker classes

[Flamefire]

Great use of the circular buffer, good idea!

It does make sense to separate the cheats and the key/command tracker although I don't really like putting the cheats into the world class or having the command tracker be a part of the cheats creating a cyclic dependency and having to do cheats.trackX -> tracker.trackX

So maybe add an instance of each class to the game interface?

[kubaau]

Great use of the circular buffer, good idea!

It does make sense to separate the cheats and the key/command tracker although I don't really like putting the cheats into the world class or having the command tracker be a part of the cheats creating a cyclic dependency and having to do cheats.trackX -> tracker.trackX

So maybe add an instance of each class to the game interface?

Moved CheatCommandTracker out of Cheats and into dskGameInterface as it is its only user.

[kubaau]

@Flamefire Please review the updates. Sorry for the huge delay :D

[Flamefire]

Looks good to me, thanks! But see the comment for the future.