Virtualization links

See merge request sccs/docs.it4i.cz!198

vysvetleni k pouzitym cislum portu v prikladech

See merge request sccs/docs.it4i.cz!195

Job features

See merge request sccs/docs.it4i.cz!194

# Conflicts:
#   mkdocs.yml

Update ssh-keys.md

See merge request sccs/docs.it4i.cz!193

Update index.md

See merge request sccs/docs.it4i.cz!192

# Conflicts:
#   docs.it4i/index.md

Get rid of 'module' in environment-and-modules.md

See merge request sccs/docs.it4i.cz!191

Anselm revision

See merge request sccs/docs.it4i.cz!188

Update information in capacity-computing.md to match Salomon cluster.

See merge request sccs/docs.it4i.cz!190

Singularity

See merge request sccs/docs.it4i.cz!187