Merge branch 'develop' of github.com:hpcugent/easybuild-easyblocks into develop
Merge branch 'contrib_CUDA_easyblock' of github.com:boegel/easybuild-easyblocks into contrib_CUDA_easyblock
check whether DISPLAY should be unset, get rid of chmod'ing install dir, not needed (leftovers from easyblock that was used as a base for this one)