Added Country string and GetCountry method to Address.cs.
Removed unused namespace directive from AssemblyInfo.cs. Added ReSharper file Faker.Net.sln.DotSettings.user to .gitignore.
Fixed a typo in AddressTests.TestUKCountry - it was calling Address.GetUKCounty instead of Address.GetUKCountry. Added TestWorldCountry test method following the same logic as TestUKCountry.