Strugatsky, Taxes, and Assorted Other Stuff

- Added the People's State of Strugatsky. This almost completes the
western half of the map.
- The three kinds of taxes have now been overhauled - taxes can now be
NEGATIVE, representing subsidies. By default, you subsidize military and
theocracy vassals at 25%, and tax republic vassals at 25%.
- Added an event chain allowing a ruler to punish vassals for intrarealm
conflicts.
- Streamlined and simplified cloning and fixed some of its biggest bugs.
Clones still don't necessarily look like their donors, though.
- Overhauled nicknames and also added a bunch of new ones.