Commented Issue: Add MbUnit test framework support [11768]

I didn't see any specific support for MbUnit although the fallback assertion exception thrown works with MbUnit v2 for the most part. However, MbUnit v3 was a complete rewrite using the Gallio automation platform and is more complicated than simply throwing an assertion exception. I submitted a patch (ID: 11529) that implements explicit support for MbUnit 2 and 3. MbUnit 3 assertions rely on Gallio which required calling a few different methods, so it ended up making more reflection calls than I'd like, but they were necessary to make the fluent assertions behave more like the other MbUnit 3 assertions.