Changed religious_head government requirements so that vassal bishops are no longer using the new Religious Head government type, and can be made into Cardinals, while also allowing the Patriarch of Orthodoxy, and other religious heads(Except Caliph or Fylkir, as those are playable by default.) to be playable.

Added localisation text for the new government type.

Initial release. Ignore the first two change notes; that's from testing the mod upload system, and making sure I had the right files uploaded.