spell: bombs

[Håvard Lindheim <haavarl>]

The BOMB spell is if course quite funny. But, with a little
imagitative use, it could crash the game. It is rather funny to pick
up a bomb and deliver it next to a monster, but if you carry it long
enough it explodes and thus crashes the game. 

The bombs should perhaps have no_pick, or even better: Function as the
cursed potions - detonate a large fireball at yourself. Or possibly
"detonate bomb on self".

H--