Several casting related tweaks made. see 'help changes_15092008'

From the old notice board in the game, kept as an archive.

Fizzling no longer happens out of combat.
Spell casting no longer causes voice/upper body delays
(jab/stab delays).
Leathercrafting now allows Collars and Barding of custom level.
Fixed rogue %s in simulacrum description.
Stalkers no longer get saved in citadels.
No longer possible to get into endless fights with the supermob by
damaging room programs.