Add support for Autos window

According to [the VS2017 docs](https://docs.microsoft.com/en-us/visualstudio/debugger/autos-and-locals-windows) (and observed in practice), the Autos window does not work in F#. I suggest adding support for the Autos window. It's a great help in C# and VB debugging, and while I spend far less time debugging with F# and functional architectures makes debugging generally easier, the (lack of) tooling makes some aspects of F# debugging more painful than it needs to be. The Autos window could alleviate some of that pain.