Added support for CV-based hyperparameter search, including for neural network models.
0.1.3
Fixed PCA to respect the variance retention parameter passed (rather than always using 0.9), shifted CV to be before model training so that its results wouldn't be influenced (in the neural network model it seemed to change the starting parameters and therefore the CV performance).
0.1.2
Fixed module imports for surveyml module.
0.1.1
Initial release with the single CATI1 proof-of-concept example.