Work in progress: cleaning up default controller, creating a proper (and only way) to retrieve versions, now we shall deal with versions and not nodes anymore because it's the link between the node (position, classification) and the object (the data). One node can have multiple objects and one object multiple node therefore the only unique element in the system is the Version: one node, one object.
For now we retrieve from database all the last versions (meaning all the languages) and we choose afterward.