Create Viewrepr which handle the representation of the View. - Put in all the function about Hidden Nodes - In scene, initializes this.view with the first view of the project (later it will be handled by a view manager)

{
  "sessionModerator"   : "org.iri_research.renkan.coweb.RenkanSessionModerator",
  "moderatorIsUpdater" : true,
  "operationEngine"    : true,
  "bots": [] 
}