Modified religious conversions, 1250 Italian prince changes

Removed "Demand Religious Conversion" through editing defines.lua.
Modified Lord Spiritual Job and conversion decisions to restrict
conversions to type (Werewolves can only convert to werewolf tribe,
Vampires can only convert to vampire covenants, etc...).

Vampire:
Lord
Mithras of the Baronies of Avalon is now Circle of the Crone.  He is an
unliving pagan god with his own cult.  Invictus provinces in England are
now Circle of the Crone provinces.
Minor adjustments to Italian princes
and dynasties for 1250 bookmark.
Minor adjustment to vampire special
empire titles to make them less restrictive.

Werewolf:
Minor
adjustments to Italian princes and dynasties for 1250 bookmark.
Minor
adjustments to werewolf special empire titles to make them less
restrictive.