At the moment I'm trying to figure out how to setup a proper CI using AppVeyor. The build is working fine, however AppVeyor seems to ignore my appveyor.yml. Moving it to a subdirectory and setting this over the Web UI didn't help either and the YAML file is also valid.
You can find the repository (with the appveyor.yml) here.
That project was added into AppVeyor as "generic" Git repository where appveyor.yml is not supported. Re-create the project as "GitHub" repository.