Implement skill-specific titling for Kiku and Nemelex (9144)

This patch changes the title displayed for having highest skill in Necromancy
and Evocations with Kiku and Nemelex, respectively. Since those gods use those
skills for their abilities it seems appropriate. Additionally, it is a nice way
for some of the titles on the huge list of unused ones to get some light.

This overrides the normal highest skill titles for Necromancy/Evocations
(respectively), but not the easter egg one for Spriggans.

(committer's note: adjusted commit message.)
Tidy