Cultures and homelands (adapted version of what ludi mod did)

[xEiweix]

merge most useless cultures to usefull ones to improve performance delete all homeland except the sokoto cultures in Africa delete most homelands except natives in America delete most useless homelands in South east Asia

dreamz is already working on that

[MasterSon-git]

rework state pops actually done from 00-03 TODO: 04-15