ENH: Replacing the 3 SVM classification applications to handle the OpenCV machine learning framework

DOC: Typo and punctuation correction and clarification of the documentation and menus of the otbTrainImagesClassifier application

ENH: Add measurements of the confusion matrix in the LOG of the otbComputeConfusionMatrix application

ENH: Removal of the numbers of reference and produced labels input parameters in the otbComputeConfusionMatrix application

ENH: Setting the default field name containing the label values to Class in otbComputeConfusionMatrix

ENH: Definition of a format for confusion matrix files in otbComputeConfusionMatrix and otbFusionOfClassifications applications

ENH: add vfn option in ValidateImageClassifier application to be consistent with training application.

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.

ENH: Remove useless parameters for opencv svm classification in otbTrainMachineLearningImagesClassifier application.