[crossfire] Casting when confused

[Nicolas Weeger (Laposte)]

Hello.

I implemented the feature request #656195: More effects of confusion.
See details at 
https://sourceforge.net/tracker/index.php?func=detail&aid=656195&group_id=13833&atid=363833

Now casting when confused can have 3 effects:
 * one item is transformed temporarily to flowers
 * 2 random statistics are temporarily swapped
 * a random spell is cast.

A new force type is introduced, FORCE_TRANSFORMED_ITEM, which does some magic 
when it expires to restore item.


Nicolas