Some stuff might not work on Windows?

[pllim]

There is no Appveyor nor Windows nor Windows build on Travis nor Azure. When I run the unit tests locally on Windows 10, I had to mark two tests xfail over at #54 . Maybe this is a non-issue as Heroku is unlikely running Windows 10, so opening this issue just as FYI to those who also test this locally on Windows.

[astrofrog]

I think we should add a Windows build since it's never a bad idea to improve portability for future, and also if some of our maintainers are using Windows :)

Maybe we could actually add a Windows build on Travis using the new ci-helpers stuff for that? (to avoid having to set up multiple CI services). Or we could just switch completely to Azure. @bsipocz - what do you think?

[bsipocz]

using travis is probably the easiest, now that @drdavella set it up. Also, you're welcome to try azure, I won't have time to invent in this direction in the coming weeks...