[Admins]

I thought of supporting different currencys,
like if someone wants to get gold ore for his
hats then you will have to give him gold ore,
adds some more trading. But it will probably end
in one main currency, because things like hats are
harder to handle (you will be slower when having
hats in your inventory).

Also the player-to-player trading was disabled in the
preview (because not fully working yet)