appveyor: Add Windows CI support (thanks @zanderz)
appveyor: Add Windows CI support (thanks @zanderz)

keybase/kbfs,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/kbfs