ENH: Replacing home made MeanShift implementation by EDISON's one

Code/BasicFilters/CMakeLists.txt

Code/BasicFilters/otbMeanShiftImageFilter.h

Code/BasicFilters/otbMeanShiftImageFilter.txx

Code/BasicFilters/otbMeanShiftImageFilterBase.h

Code/BasicFilters/otbMeanShiftImageFilterBase.txx

Code/BasicFilters/otbMeanShiftVectorImageFilter.h

Code/BasicFilters/otbMeanShiftVectorImageFilter.txx

Testing/Code/BasicFilters/CMakeLists.txt

Testing/Code/BasicFilters/otbBasicFiltersTests9.cxx

Testing/Code/BasicFilters/otbMeanShiftImageFilter.cxx

Testing/Code/BasicFilters/otbMeanShiftVectorImageCluster.cxx

Testing/Code/BasicFilters/otbMeanShiftVectorImageFilter.cxx