Merge branch 'content_revision' into 'master'

...t4i/anselm-cluster-documentation/shell-and-data-access.md

docs.it4i/anselm-cluster-documentation/storage.md

...selm-cluster-documentation/storage/cesnet-data-storage.md

docs.it4i/salomon/shell-and-data-access.md

docs.it4i/salomon/storage.md

docs.it4i/salomon/storage/cesnet-data-storage.md

mkdocs.yml