Model.optimize

[avibryant]

This is an optimize that is a close parallel to sample - instead of a Sample object it returns an Estimate object, which has a similar predict method to Sample but this one returns a single object instead of a List.

[codecov-io]

Codecov Report

Merging #416 into nuke-rv will increase coverage by 7.49%. The diff coverage is 0%.

@@             Coverage Diff             @@
##           nuke-rv     #416      +/-   ##
===========================================
+ Coverage    31.63%   39.13%   +7.49%     
===========================================
  Files           66       67       +1     
  Lines         2652     2655       +3     
  Branches       151      146       -5     
===========================================
+ Hits           839     1039     +200     
+ Misses        1813     1616     -197

Impacted Files	Coverage Δ
...rc/main/scala/com/stripe/rainier/core/Sample.scala	0% <ø> (ø)	:arrow_up:
.../main/scala/com/stripe/rainier/core/Estimate.scala	0% <0%> (ø)
...src/main/scala/com/stripe/rainier/core/Model.scala	37.93% <0%> (+37.93%)	:arrow_up:
.../scala/com/stripe/rainier/compute/Translator.scala	95% <0%> (+1.25%)	:arrow_up:
...in/scala/com/stripe/rainier/compute/Gradient.scala	93.44% <0%> (+1.63%)	:arrow_up:
...ain/scala/com/stripe/rainier/compute/RealOps.scala	78.33% <0%> (+1.66%)	:arrow_up:
...cala/com/stripe/rainier/compute/Coefficients.scala	95.16% <0%> (+4.83%)	:arrow_up:
...c/main/scala/com/stripe/rainier/compute/Real.scala	74.6% <0%> (+7.93%)	:arrow_up:
... and 11 more

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