2.02.0:zeress:15 History + CB type fixes for issue #41

Gengis has no land, preventing players from starting as him in 1220.2.1
e_mongol_empire cannot use the tribal_invasion cb
Many Ghaznavid rulers are missing
The Ghaznavid rulers after ~1040 are erroneously vassals of the Seljuks
c_foggia should not be independent 1053+