changed appveyor.yml based on guide from: http://tjelvarolsson.com/blog/how-to-continuously-test-your-python-code-on-windows-using-appveyor/
changed appveyor.yml based on guide from: http://tjelvarolsson.com/blog/how-to-continuously-test-your-python-code-on-windows-using-appveyor/

Lucaszw/jupyter-helpers,Lucaszw/jupyter-helpers