ADD: Application for Training multiple types of classifier.

Applications/Classification/CMakeLists.txt

...lassification/otbTrainMachineLearningImagesClassifier.cxx

CMake/otbIncludeDirectories.cmake

CMakeLists.txt

Code/UtilitiesAdapters/CMakeLists.txt

Code/UtilitiesAdapters/OpenCV/CMakeLists.txt

...dapters/OpenCV/otbKNearestNeighborsMachineLearningModel.h

...pters/OpenCV/otbKNearestNeighborsMachineLearningModel.txx

.../UtilitiesAdapters/OpenCV/otbLibSVMMachineLearningModel.h

...tilitiesAdapters/OpenCV/otbLibSVMMachineLearningModel.txx

Code/UtilitiesAdapters/OpenCV/otbMachineLearningModel.h

...iesAdapters/OpenCV/otbRandomForestsMachineLearningModel.h

...sAdapters/OpenCV/otbRandomForestsMachineLearningModel.txx

Code/UtilitiesAdapters/OpenCV/otbSVMMachineLearningModel.h

Code/UtilitiesAdapters/OpenCV/otbSVMMachineLearningModel.txx