Support for native projects

[jazzdelightsme]

(first: this is a great project--thanks!)

I tried adding the ReadOnlySourceTree NuGet package to a solution that contained a native DLL project. It correctly got rid of the bin/obj directories from under the native DLL's project source directory, but instead of the resulting native DLLs going into \bin, they just went at the root (\x64\Debug and \x64\Release for x64 binaries; \Debug and \Release for x86 binaries.