Change the default value object serializer to intelligently invoke a constructor

[cameronfletcher]

This also bombs out with an InvalidOperationException "Sequence contains more than one matching element" when there are two constructors taking the same number of parameters matching the serialized count.

[cameronfletcher]

I've addressed the InvalidOperationException but now need to introduce some more thourough testing and caching.
I think if this is to be performant it will need to register deserialization as a delegate taking the serialized dictionary as an argument.