Merge branch 'develop' of github.com:hpcugent/easybuild-easyconfigs into develop
Merge branch 'contrib_CUDA' of github.com:fgeorgatos/easybuild-easyconfigs into contrib_CUDA
add versionsuffix back that shouldn't have been removed, add fixes for SLES systems, rename SYSTEM_* to OS_*
CentOS is a RHEL clone
Merge pull request #9 from boegel/contrib_CUDA

bug fixes for CUDA easyconfig file