DOC: review application documentation: Classification, Calibration, Utils part2

Applications/Classification/otbComputeImagesStatistics.cxx

Applications/Classification/otbImageSVMClassifier.cxx

Applications/Classification/otbKMeansClassification.cxx

Applications/Classification/otbSOMClassification.cxx

Applications/Classification/otbTrainSVMImagesClassifier.cxx

...cations/Classification/otbValidateSVMImagesClassifier.cxx

Applications/Radiometry/otbOpticalCalibration.cxx

Applications/Radiometry/otbSarRadiometricCalibration.cxx

Applications/Utils/otbReadImageInfo.cxx

Applications/Utils/otbSmoothing.cxx

Applications/Utils/otbSplitImage.cxx

Applications/Utils/otbVectorDataExtractROIApplication.cxx

Applications/Utils/otbVectorDataSetField.cxx

Applications/Utils/otbVectorDataTransform.cxx