DOC: Doxygen example to the end of description

Code/DisparityMap/otbNCCRegistrationFilter.h

Code/FeatureExtraction/otbRemoveTortuousPathListFilter.h

Code/FeatureExtraction/otbRemoveWrongDirectionFilter.h

Code/FeatureExtraction/otbRoadExtractionFilter.h

Code/FeatureExtraction/otbSimplifyPathListFilter.h

Code/Fusion/otbBayesianFusionFilter.h

Code/Fusion/otbSimpleRcsPanSharpeningFusionImageFilter.h

Code/IO/otbDEMToImageGenerator.h

Code/IO/otbSpatialObjectDXFReader.h

Code/Markov/otbMRFEnergy.h

Code/Markov/otbMRFEnergyEdgeFidelity.h

Code/Markov/otbMRFEnergyGaussian.h

Code/Markov/otbMRFEnergyGaussianClassification.h

Code/Markov/otbMRFEnergyPotts.h

Code/Markov/otbMRFOptimizer.h

Code/Markov/otbMRFOptimizerICM.h

Code/Markov/otbMRFOptimizerMetropolis.h

Code/Markov/otbMRFSampler.h

Code/Markov/otbMRFSamplerMAP.h

Code/Markov/otbMRFSamplerRandom.h