Add Util heuristic

[codecov[bot]]

Codecov Report

Merging #62 (1ba2d34) into master (2886b6f) will increase coverage by 0.54%. The diff coverage is 93.33%.

@@            Coverage Diff             @@
##           master      #62      +/-   ##
==========================================
+ Coverage   90.00%   90.54%   +0.54%     
==========================================
  Files          19       20       +1     
  Lines        1570     1660      +90     
==========================================
+ Hits         1413     1503      +90     
  Misses        157      157              

Impacted Files	Coverage Δ
src/core/data.jl	80.92% <93.33%> (+0.56%)	:arrow_up:
src/util/rop_utilization.jl	93.33% <93.33%> (ø)
src/util/restoration_redispatch.jl	82.69% <0.00%> (+11.53%)	:arrow_up:

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[noahrhodes]

@ccoffrin The requested changes have been made, and along with some response comments. Please let me know if there are further changes to make.