Revolts Overhaul

Rewrote popular revolt escalation to be much simpler, as the originally planned system was just undoable in CK2. The new version is much more all-or-nothing. To prevent this from spamming global revolts, actual organized rebellions now require a minimum revolt risk threshold of 50% - anything below this will just give the province temporary maluses.
And apparently the last one didn't take properly? Gah, Git is confusing.