Estimating the (pseudo-)probabilities of voting results
Renamed a class
Flattened test class hierarchy
Added PMMLUtil utility class
Updated JPMML-Model dependency
Improved the handling of missing input values

The PMML specification does not specify the handling of missing input
values when evaluating the GeneralRegressionModel element. The current
implementation takes guidance from the RegressionModel element. In
brief, regression-type models evaluate to a missing value, whereas
classification-type models throw an instance of MissingResultException.
Refined exception type
Renamed local variables