Directional spell

Certain spells ask "In what direction?" As with wands, you can answer with any of the standard directions [hjklyubn], self [.s], up [<], or down [>]. If you provide some other response, the spell is wasted ("What a strange direction!").

These spells are directional:
 * spellbook of cancellation
 * spellbook of cone of cold
 * spellbook of dig
 * spellbook of drain life
 * spellbook of extra healing
 * spellbook of finger of death
 * spellbook of fireball
 * spellbook of force bolt
 * spellbook of healing
 * spellbook of knock
 * spellbook of magic missile
 * spellbook of sleep
 * spellbook of slow monster
 * spellbook of polymorph
 * spellbook of stone to flesh
 * spellbook of teleport away
 * spellbook of turn undead
 * spellbook of wizard lock