Merge branch 'ci' into 'master'

.gitattributes

.gitlab-ci.yml

CI/README.md

CI/RH7/Dockerfile

CI/RH7/rclone.conf

CI/RH7/yum.conf

CI/Ubuntu/Dockerfile

CI/Ubuntu/itk_gcc_check.diff

CI/Ubuntu/rclone.conf

CI/crop_s2.sh

CI/ctest2junit.xsl

CMakeLists.txt

Code/Common/CMakeLists.txt

Code/Common/include/BaseImageTypes.h

Code/Common/include/FileUtils.h

Code/Common/include/FluentXML.h

Code/Common/include/GlobalDefs.h

Code/Common/include/ImageResampler.h

Code/Common/include/Macros.h

Code/Common/include/ResamplingBandExtractor.h