Mac compatibility

[storms-lab]

It seems like this project should work with Unity on Mac, but it does not currently. I get the following errors when trying to open the SimpleNuGetDependency.Unity project.

[andreiborodin]

@storms-lab, I went ahead and fixed this, would be great if you tried it out!

[andreiborodin]

I will close the issue, and feel free to re-open or file a new issue if needed.