Further conversions

Winds, Sandstorm, and monster casting support. Monsters will always cast
'old style' area spells.

The 'old style' setting has been made a property that can be adjusted
live without issue. New style AEs will persist and stay with the caster
as he runs around, they have a mana drain, and they have a limited range
based on power. Old style AEs will function exactly as before.