2.06.3:zeress:31 Maintenance Events fix

- The Orthodox heresies now count for reclaiming Byzantium
- Byzantium should no longer shatter if held by someone who is a new
orthodoxy Heretic
- The Knights Templar and Knights Hospitaller should now properly
vassalize to a new orthodoxy Catholic
- Did some cleaning up of the file as well. Mostly added comment code
where I knew what the block did