#[ModComp] Sever Soul Changes

Credits: MagisterCultuum (modified by Terkhen)

Development branch: extramodmod

Thread: http://forums.civfanatics.com/showthread.php?t=455111

Severed souls now last three turns. The caster cannot cast Sever soul if it already has a Severed soul summoned. Severed souls cannot capture but they can move through enemy territory and explore enemy cities. They cannot fly but they can move two squares and pass through impassable terrain. Severed souls get the movement, perception and immunity promotions of the unit that created it.