Reorganized exports.

[da1nerd]

This was going to be related to #50 until I discovered that wasn't a bug at all. So this PR instead introduces a number of updates to make the module more usable.

---

This change is 

[codecov]

Codecov Report

Merging #52 into develop will increase coverage by 1.48%.
The diff coverage is 98.16%.

@@             Coverage Diff             @@
##           develop      #52      +/-   ##
===========================================
+ Coverage    92.85%   94.34%   +1.48%     
===========================================
  Files           29       32       +3     
  Lines          854     1008     +154     
  Branches        88      116      +28     
===========================================
+ Hits           793      951     +158     
+ Misses          61       56       -5     
- Partials         0        1       +1

Impacted Files	Coverage Δ
src/core/Prediction.ts	100% <100%> (ø)
src/algorithms/CharacterLength.ts	100% <100%> (ø)	⬆️
src/index/PermutationIndex.ts	100% <100%> (ø)	⬆️
src/core/Parser.ts	85.36% <100%> (ø)
src/algorithms/NgramRelativeTokenDistance.ts	96% <100%> (+0.54%)	⬆️
src/index/CorpusIndex.ts	100% <100%> (ø)	⬆️
src/core/Engine.ts	86.75% <100%> (ø)
src/util/testUtils.ts	98.82% <100%> (+1.17%)	⬆️
src/core/index.ts	100% <100%> (ø)
src/index/AlignmentMemoryIndex.ts	92.85% <100%> (+5.35%)	⬆️
... and 51 more

---

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 1c34c81...68ae261. Read the comment docs.