BoundNormalizedVariable
                        Take a normalized variable and transform it
                        back to a bounded variable.
CovarianceWithMissing   Estimate covariance when data is missing
FI_test                 Imputation Test Data
FI_train                Imputation Training Data
FI_true                 Imputation "True" Data
FastImputation          Use the pattern learned from the training data
                        to impute (fill in good guesses for) missing
                        values.
NormalizeBoundedVariable
                        Take a variable bounded above/below/both and
                        return an unbounded (normalized) variable.
TrainFastImputation     Learn from the training data so that later you
                        can fill in missing data
UnfactorColumns         Convert columns of a dataframe from factors to
                        character or numeric.
