Merge branch 'master' into 'virtual_environment'

docs.it4i/EasyBuild-Hands-on-2018/Introduction.md

docs.it4i/EasyBuild-Hands-on-2018/create.md

docs.it4i/EasyBuild-Hands-on-2018/easybuildandsingularity.md

docs.it4i/EasyBuild-Hands-on-2018/firstsoftware.md

docs.it4i/EasyBuild-Hands-on-2018/git-2.19.0.eb

docs.it4i/EasyBuild-Hands-on-2018/git-2.19.1.eb

docs.it4i/EasyBuild-Hands-on-2018/modification.md

docs.it4i/EasyBuild-Hands-on-2018/template.eb

docs.it4i/EasyBuild-Hands-on-2018/troubleshooting.md

docs.it4i/anselm/job-submission-and-execution.md