Support ASP.NET vNext

This is the first part of #170

/cc @lodejard @davidfowl @Eilon @glennc
This is why you don't want to copy directly from the `kvm` repo - those are *source* files (i.e. not compiled). You need to either take the copies of `kvm` that are in the Home repo, or perhaps some build output from somewhere (not sure if the CI builds this - yet).