tentative attempt to add appveyor testing
tentative attempt to add appveyor testing

original-commit-id: 88834869458864428101b1e4460fc3b44a3654ab
original-commit-url: https://github.com/ipython-contrib/IPython-notebook-extensions/commit/88834869458864428101b1e4460fc3b44a3654ab

jcb91/jupyter_nbextensions_configurator,jcb91/jupyter_nbextensions_configurator,jcb91/jupyter_nbextensions_configurator,jcb91/jupyter_nbextensions_configurator