2.07.0:zeress:22 Loan fixes + Balance tweaks

- You can no longer borrow money from Holy Orders
- Various issues with loan mechanics fixed. This fix will remove all
current loans from saves prior to this patch for the fix
- Removed the old method for keeping track of loans, as inherited
character_modifiers work much better
- It is now possible for depressed AI characters to commit suicide on a
very low chance
2.07.0:zeress:23 Map tweaks

- Fixed a few incorrect desert terrain spots in Egypt