MRG: Synchronize with branch develop

.gitlab-ci.yml

CI/Dockerfile.nat

CI/Dockerfile.shark3.1.4

CI/README.md

CI/configure_option.cmake

CI/main_ci.cmake

CMake/OTBModuleHeaderTest.cmake

CONTRIBUTING.md

Documentation/Cookbook/rst/CompilingOTBFromSource.rst

Documentation/Cookbook/rst/Contributors.rst

Documentation/Cookbook/rst/FAQ.rst

Documentation/Cookbook/rst/index.rst

Documentation/Cookbook/rst/index_TOC.rst

Documentation/SoftwareGuide/Latex/CMakeLists.txt

Documentation/SoftwareGuide/Latex/Contribute.tex

Documentation/SoftwareGuide/Latex/ContributorList.tex

Documentation/SoftwareGuide/Latex/Contributors.tex

Documentation/SoftwareGuide/Latex/Introduction.tex

Documentation/SoftwareGuide/Latex/SoftwareGuide.tex

...hangeDetection/KullbackLeiblerSupervizedDistanceChDet.cxx