Basic Legislature Framework

This adds a new crown law "Legislative Authority," and the basics of the
"Rule by Decree" menu. The player can now attempt to dissolve the
legislature and rule by decree, or found a legislature if there isn't
one already. At the moment, this doesn't do anything other than
potentially cause a constitutional crisis.

I also fixed some bugs with constitutional crises caused by refusing to
hold elections.
Additional Legislature Work

- Fleshed out the legislature with more factions and possible demands
- Fixed several bugs related to rebellions
- Merged several vanilla events as placeholders (mostly things like
assassination events)
Compatibility Update and Big CB Overhaul

Mostly updating for comparison with the latest beta patch. Also the Big
CB Overhaul got into it.
Merge pull request #5 from Galle-/Legislatures-and-Factions

Legislatures and factions