Mise en place du nouveau mecanisme de stats streamées

Code/BasicFilters/otbStreamingStatisticsImageFilter.h

Code/BasicFilters/otbStreamingStatisticsImageFilter.txx

Code/Common/otbPersistentFilterStreamingDecorator.h

Code/Common/otbPersistentFilterStreamingDecorator.txx

Code/Common/otbPersistentImageFilter.h

Code/IO/otbStreamingImageVirtualWriter.h

Code/IO/otbStreamingImageVirtualWriter.txx

...g/Code/BasicFilters/otbStreamingStatisticsImageFilter.cxx

Testing/Code/Common/CMakeLists.txt

Testing/Code/Common/otbCommonTests.cxx