Fixed cast animation for two-handed spells by adding "RitualSpellEffect" keyword

Fixed cast animation for two-handed spells by adding RitualSpellEffect keyword.
ESL version of the main file.

This version allows any type of creature to be raised with the new dead thrall spells (rather than just humans/elves). The base game's Dead Thrall spell is left alone.

This version allows for raising creatures as well as people with the new thrall spells. ESL version.