WIP Installation [it].
Merge branch 'master' of github.com:nethesis/nethserver-docs
Merge branch 'master' of github.com:nethesis/nethserver-docs
Merge remote-tracking branch 'nethesis/master'

Conflicts:
	user-manual/it/installation.rst
Merge remote-tracking branch 'nethesis/master'
Section [it] Gestione pacchetti
Merge pull request #13 from DavidePrincipi/master

Section Gestione pacchetti [it]