PR: windows ci - appveyor

[danbradham]

closes #16

[codecov-io]

Codecov Report

Merging #19 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #19   +/-   ##
=======================================
  Coverage   40.38%   40.38%           
=======================================
  Files           2        2           
  Lines         156      156           
=======================================
  Hits           63       63           
  Misses         93       93

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[goanpeca]

I activated appveyor for the spyder-ide account

@danbradham looks good, but we need to add the badge to the README :-)

[![Build status](https://ci.appveyor.com/api/projects/status/q0h4yv4tot3aqjyv?svg=true)](https://ci.appveyor.com/project/spyder-ide/qtsass)

[goanpeca]

LGTM!