[TEST][CLEANUP] - Adding unit tests for UnivariateStatsMeta, UnivariateStatsMetaFunction, adding generic getter setter test framework, added load json functionality to test memory repository, using .equals to compare strings, actually overriding readRep, adding @Override annotations
Merge pull request #640 from brosander/univariate-cleanup-rebase

[TEST][CLEANUP] - Adding unit tests for UnivariateStatsMeta, UnivariateS...
[TEST] - Renaming GetterSetterTest to keep it from getting picked up by junit
Merge pull request #641 from brosander/GetterSetterTester

[TEST] - Renaming GetterSetterTest to keep it from getting picked up by ...
[TEST][CLEANUP] - Pulling FieldIndex out to its own file, adding tests for FieldIndex, UnivariateStatsData
Merge pull request #642 from brosander/fieldindextest

[TEST][CLEANUP] - Pulling FieldIndex out to its own file, adding tests f...