Bugfix: Fix lightning-bolt artifacts bug

Artifacts that are suposed to fire lightning bolts were instead fireing error messages when wielded by enemies. The culprit was a math screwup.
Artifact Tweaks and Bugfixes

Vorpal blade wasn't haveing it's exploading dice counted, due to a missing assignment.

Removed quote needed tags on some artifacts that do, in fact, now have quotes.

Added Deep ones to the list of demihumans (affected by werebane)

Changed Luck Blade (Convict first gift) to a short sword
	Created luck-biased exploading-dice function.
	Luck Blade's base die is now a luck-biased exploading-dice.
	Once the Convict maxes out their luck, they can do quite respectable amounts of damage with the Luck Blade.
	If their luck items become cursed and/or they loose their luck, they will do very little damage.

Increased the to-hit bonus of Kiku-ichimonji (Samurai first gift) to +1d4 (was +1)