[crossfire] Code cleaning

[Mark Wedel]

Nicolas Weeger wrote:
> Hello.
> 
> I'd like to remove the following things from trunk:
> * multiplayer spells support. Never used, and current implementation is bad I 
> think
> * quest system. Again, that's not really thought of, would need much more 
> thinking - or even specific coding per quest
> * "new material" code. No one seems to know what it's supposed to do, how it 
> works (does someone actually use it?). I'd keep the idea of material flags / 
> combination, but remove other things.

  sounds good to me.