Add windows build steps and wheel build scripts

[peterjc123]

@soumith

[codecov-io]

Codecov Report

Merging #998 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #998   +/-   ##
=======================================
  Coverage   62.69%   62.69%           
=======================================
  Files          65       65           
  Lines        5080     5080           
  Branches      761      761           
=======================================
  Hits         3185     3185           
  Misses       1678     1678           
  Partials      217      217

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a664dd0...c15171a. Read the comment docs.