ENH: Renaming TrainImagesClassifier applications and add a confusion matrix output file

Applications/Classification/CMakeLists.txt

Applications/Classification/otbTrainBoost.cxx

Applications/Classification/otbTrainDecisionTree.cxx

Applications/Classification/otbTrainGradientBoostedTree.cxx

Applications/Classification/otbTrainImagesClassifier.cxx

Applications/Classification/otbTrainImagesClassifier.h

Applications/Classification/otbTrainKNN.cxx

Applications/Classification/otbTrainLibSVM.cxx

Applications/Classification/otbTrainNeuralNetwork.cxx

Applications/Classification/otbTrainNormalBayes.cxx

Applications/Classification/otbTrainRandomForests.cxx

Applications/Classification/otbTrainSVM.cxx

Code/Learning/otbConfusionMatrixCalculator.h

Code/Learning/otbConfusionMatrixMeasurements.h

Testing/Code/Fuzzy/otbConfusionMatrixToMassOfBeliefTest.cxx

Testing/Code/Learning/otbConfusionMatrixMeasurementsTest.cxx