Add some countries

Add countries to make equal quantity of countries in Countries.php and
CountryNativeNames.php
New class Currency

Has 7 methods
getList() - list of all currencies
getFullInfo($country) - all info about $country currency
getName($country), getSign($country), getCode($country),
getFractalUnit($country), getFractalDivision($country) - get name, sign
, code, fractal unit and fractal division of $country
issue #12

Rename Countries class (per language) #12