Added two new cultures to Brazil: Gaucho and Nordestino

Gaucho is the main culture on the southern provinces (Rio Grande do Sul,
Santa Catarina, Paraná and in Argentina/Uruguay), while Nordestino is on
the northeastern ones. I also added a new tag for Equador Confederation.
This changes should better simulate the revolts that occured mid-XIXth
century in Brazil
Changed Bourgeois Dictatorships to Oligarchic Republics

Changes are explained on this thread:
http://www.reddit.com/r/Vic2Mod/comments/2phm0w/oligarchic_republics_v10/

I also added events to accept a military coup or to abdicate the throne
as a monarch.