MRG: Merge branch 'develop' into deprecate-mapnik

.gitlab/merge_request_templates/request_for_changes.md

Documentation/Cookbook/rst/AdvancedUse.rst

...ations/AppClassification/app/otbTrainImagesClassifier.cxx

...ations/AppClassification/app/otbTrainVectorClassifier.cxx

.../AppClassification/include/otbLearningApplicationBase.hxx

Modules/Core/ImageBase/include/otbImageIOBase.h

Modules/Core/ImageBase/src/otbImageIOBase.cxx

...jectDetection/include/otbDescriptorsListSampleGenerator.h

...on/ObjectDetection/include/otbObjectDetectionClassifier.h

...e/Descriptors/include/otbImageToSIFTKeyPointSetFilter.hxx

...clude/otbKullbackLeiblerSupervizedDistanceImageFilter.hxx

Modules/Filtering/Path/include/otbCompacityPathFunction.hxx

...les/Filtering/Path/include/otbOrientationPathFunction.hxx

Modules/IO/IOGDAL/src/otbGDALImageIO.cxx

Modules/IO/IOONERA/src/otbONERAImageIO.cxx

Modules/IO/IORAD/src/otbRADImageIO.cxx

Modules/IO/ImageIO/include/otbImageFileReader.hxx

Modules/OBIA/RCC8/include/otbRCC8GraphFileWriter.h

Modules/OBIA/RCC8/include/otbRCC8GraphFileWriter.hxx

...n/Conversion/include/otbOGRDataSourceToLabelImageFilter.h