Added Basque as lenguage and States in spain

Added Basque lenaguage for spanish localization.

Added Spanish states.

It would be nice if it could be possible to define in this file zones too, because it is usual to split spain in 3~4 zones (Península,Baleares,Canarías,Ceuta y Melilla) for shipping an taxinf purpouses and group states in theese zones.