Move config files to build-time creation to avoid write permissions. …

[quinnj]

…Fixes #274

[codecov]

Codecov Report

Merging #275 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #275   +/-   ##
=======================================
  Coverage   74.80%   74.80%           
=======================================
  Files           5        5           
  Lines         655      655           
=======================================
  Hits          490      490           
  Misses        165      165           

Impacted Files	Coverage Δ
src/API.jl	65.33% <100.00%> (ø)

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