Scan an assembly in order to create a DataContractContentSerializer

Resolves #100.
Right. So, to make it explicit, the System Under Test is the `Scan` method. That's the method you added after having written the tests. There's no *sut* object, because the SUT isn't an object, but a static method.

(When unit testing F# code, I rarely have a `sut` value, because the SUTs are functions, and functions are rarely values (not until they become closures, that is).)

Now that you know what the `actual` result is, then where are the Arrange, Act, and Assert phases in this test?