Add a quick guide on how to set up the project

[nanachi-code]

I've been writing Sketchup extension in Ruby for a while and I want to learn how to write C extension, but I have very little prior experience with VS so I don't really know where to start from this code base. Please add quick guide for it. Thanks!

[thomthom]

What is it that you are looking to do?

Hard to write a quick guide without knowing what the challenge is?