Moved DefaultHouseAd.GetAssemblyFromClass to ReflectionHelpers.GetAssemb...

...lyFromClassName, improved implementation and added unit tests.

Tests/TestData and TestData.Nested class libraries added for testing purposes. AdRotator2013.sln needs to be updated, unfortunately I don't have access to Visual Studio 2013.
Hmm, why new up the Reflection helpers?
The majority of the reflectionhelpers are static functions in a static class, no need to instantiate.

Can this be updated?