Conflicts:
	generators/input/sites/rennes/clusters/paranoia/paranoia.rb

Conflicts:
	generators/input/sites/nancy/clusters/griffon/griffon.rb

Also:
* Added support for using a vagrant box and setting SSH options
* The script prevents from adding the same host twice
* Refactoring of the NetSSH code

Conflicts:
	generators/input/sites/nancy/clusters/graphique/graphique.rb
	generators/input/sites/nancy/clusters/graphite/graphite.rb