Moved AutoFixture.NUnit.Addin.UnitTest to AutoFixture.NUnit.UnitTest
Moved AutoFixture.NUnit.Addin to AutoFixture.NUnit
Removed AutoFixture.NUnit.Addin and AutoFixture.NUnit.Addin.UnitTest projects
Remove xcopy of the libraries.
fixed the documentation to refer to test case instead of theory.
Fixed nunit.core.dll reference locations.