AppVeyor
This series add support for Visual Studio and AppVeyor.
The series add CMake project files (see commit message for reasons) and files needed for AppVeyor.
The reason for VS+AppVeyor is having some more Windows like executables (they include PDB files useful for bug reports from users for instance.
You can see results @ https://ci.appveyor.com/project/FreeTDS/vd-agent-win (I set up on an account I have so the weird name).