Rename predict! to transform! and train! to fit!.
Refactored code to introduce Transformer supertype to Learner.
Refactored eltype inference. Created OneHotEncoder.
Wrapped around standardization in MLBase.jl .
Missing MLBase wrappers added.
Wrapped PCA as transformer.
Renamed Standardizer to StandardScaler.
Refactored test fixtures. Implemented NA imputer.
Added pipeline. Made OneHotEncoder to return FloatingPoint instead of Real.
Implemented Wrapper transformer.
Implemented Identity transformer.
Moved Identity transformer into baseline.jl . Implemented Baseline learner.
Renamed BestLearnerEnsemble to BestLearner.
Using nested merge instead of merge for options. Implemented grid search in BestLearner.
Rename of train_and_transform! to fit_and_transform!. Added pipeline system test.
Merge branch 'feature/transforms' into develop
Introduction of transformers.