Implement help.getCountriesList

[aykutalparslan]

Get name, ISO code, localized name and phone codes/patterns of all available countries

help.countriesListNotModified#93cc1f32 = help.CountriesList; help.countriesList#87d0759e countries:Vector<help.Country> hash:int = help.CountriesList; ---functions--- help.getCountriesList#735787a8 lang_code:string hash:int = help.CountriesList;