Merge branch 'sampling_polygon_analysis' into develop

Modules/Applications/AppClassification/app/CMakeLists.txt

...tions/AppClassification/app/otbPolygonClassStatistics.cxx

Modules/Applications/AppClassification/otb-module.cmake

Modules/Applications/AppClassification/test/CMakeLists.txt

Modules/IO/IOXML/include/otbStatisticsXMLFileReader.h

Modules/IO/IOXML/include/otbStatisticsXMLFileReader.txx

Modules/IO/IOXML/include/otbStatisticsXMLFileWriter.h

Modules/IO/IOXML/include/otbStatisticsXMLFileWriter.txx

Modules/IO/IOXML/otb-module.cmake

Modules/IO/IOXML/test/CMakeLists.txt

Modules/IO/IOXML/test/otbIOXMLTestDriver.cxx

Modules/IO/IOXML/test/otbStatisticsXMLFileWriteAndRead.cxx

Modules/Learning/Sampling/CMakeLists.txt

...ning/Sampling/include/otbOGRDataToClassStatisticsFilter.h

...ng/Sampling/include/otbOGRDataToClassStatisticsFilter.txx

...g/Sampling/include/otbPolygonClassStatisticsAccumulator.h

...Sampling/include/otbPolygonClassStatisticsAccumulator.txx

Modules/Learning/Sampling/otb-module.cmake

Modules/Learning/Sampling/src/CMakeLists.txt

...ing/Sampling/src/otbPolygonClassStatisticsAccumulator.cxx