BUG: Neural Network training needs a matrix of labels with one column for each class and not a single column matrix with the class label.

TEST: Add a test for the optimized Dempster Shafer combination of classifiers from confusion matrices with the kappa parameter as mass of belief

ENH: Remove regression flag in Boosting machine learning model. This model can only be used for classification.

ENH: Expose K parameter to control number of neighbors used in KNN machine learning. Also expose IsRegression parameter.

ENH: Add a parameter IsRegression in BoostMachineLearningModel to indicate if it is a regression model or a classification model.

ENH: add ValidateImagesClassifier application to validate a classification model obtained with TrainMachineLearningImagesClassifier.

ENH: Add an ImageClassifier application that classifies an image using a model obtained with TrainMachineLearningImagesClassifier application.