Tag to be used with the master branch of atlas/athena. Update(s) since 2.0.128: - Retired the atlas_install_headers(...) function, making its use an error; - Made the projects detect relocation problems during installation; - Added the DEPENDS keyword to atlas_add_test(...) to conveniently declare dependencies between tests; - Made it possible to detect the exact version of the found python modules that provide a __version__ variable; * Made Findmccabe.cmake, Findpycodestyle.cmake and Findpyflakes.cmake report their exact versions; - Made sure that libffi would be set up correctly for the Python module builds; - Tweaked PyModules to work correctly specifically with LCG_101.