AppVeyor integration

[monocongo]

AppVeyor was included in the webhooks(?) for this project, and an attempt was made to remove this integration once it appeared to me that AppVeyor was primarily for .NET projects. It looks like the dis-integration is incomplete because we still see an AppVeyor error included in the checks on the project, causing a red X to appear next to the repo name. Further look at other AppVeyor Python projects shows that AppVeyor is also useful for Python so we should instead fully integrate in order to investigate whether or not AppVeyor is a good service to have tied to the project as it appears to be.

• [ ] appveyor.yml file
• [ ] project config on AppVeyor site for project

[monocongo]

https://github.com/rmcgibbo/python-appveyor-conda-example