Update to opencart.sql

Adding six countries: Republic of Kosovo (17 February 2008 separation from Serbia), Isle of Man (self-governing British Crown Dependency, has its own ISO 3166 codes), Ascension and Tristan da Cunha (The St Helena, Ascension and Tristan da Cunha Constitution Order 1 September 2009 ended the "dependency status" of Ascension and Tristan da Cunha, also they have its own ISO 3166 codes), Guernsey and Jersey (British Crown dependency, but has its own parlaments and ISO 3166 codes).