Add Windows support

[alexpilotti]

Provides fixes for various Windows compatibility issues. Closes #157

[msftclas]

@alexpilotti,
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[codecov-io]

Codecov Report

Merging #158 into master will decrease coverage by 0.08%.
The diff coverage is 13.04%.

@@            Coverage Diff             @@
##           master     #158      +/-   ##
==========================================
- Coverage   33.15%   33.06%   -0.09%     
==========================================
  Files          17       18       +1     
  Lines        1098     1104       +6     
==========================================
+ Hits          364      365       +1     
- Misses        686      690       +4     
- Partials       48       49       +1

Impacted Files	Coverage Δ
api/server.go	15.3% <ø> (+0.72%)	⬆️
cmd/draft/draft.go	2.81% <0%> (-0.13%)	⬇️
api/server_notwin.go	0% <0%> (ø)
cmd/draft/create.go	50% <100%> (ø)	⬆️
pkg/draft/pack/pack.go	53.84% <50%> (-1.71%)	⬇️

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