Added a decision to fix a bug where a duchy sometimes remains administrative even if independent.

I forgot to change the supported version number; now fixed

Support for the 1.17 update.

Extra requirements for the restore provinces decision: now you have to be coordinated to do that

Changed some of the gfx

- county of Byzantium is now appropriately named.
- Byzantium now starts with the third tier war restriction instead of second tier

India now gets slow conversion, too

Made it a bit more easy for the AI to do the great schism decision

Admin AI realms will now allow their governors to declare war if their realm size is small

The Baltic Regions will now be much more easier to convert for AI rulers after 1250 AD