Merge branch 'feature/remove-deprecated-2.9' into 'master'

CHANGELOG.md

bin/CMakeLists.txt

bin/rmgenerated.py

cmake/modules/CMakeLists.txt

cmake/modules/DuneCMakeCompat.cmake

cmake/modules/DunePythonCommonMacros.cmake

cmake/modules/DunePythonDeprecations.cmake

cmake/modules/DunePythonInstallPackage.cmake

cmake/modules/DunePythonVirtualenv.cmake

cmake/modules/UseInkscape.cmake

config.h.cmake

dune/common/version.hh

dune/python/common/CMakeLists.txt

dune/python/common/numpycommdatahandle.hh