Import all PB major_revolt CBs
All major_revolt CBs adjust dynlevy law immediately upon realm split
dynlevy: sync laws on yearly pulse, for misc. realm_size changes

This could be made notably more efficient by creating a separate,
maintenance-only event that looks like emf_dynlevy.20 but includes
a trigger for higher_tier_than = count. The generic event can't
filter those cases.
Changelog update
Merge pull request #102 from zijistark/dynlevy

dynlevy triggers for faction revolts and yearly pulse