message: create_geological_entity : from topology to geology not
  applied in tuto.
diff: @@ -152,7 +152,7 @@ int main()
  //We first create the GeoModelGeoglogicalEntity
  // Create the contacts
  for( index_t contact = 0; contact < nb_contacts; contact++ ) {
  - builder.topology.create_geological_entity(
  + builder.geology.create_geological_entity(
  Contact::type_name_static() ) ;
  // the static method type_name_static() is available for each
  // GeoModelEntity. It returns an EntityType which is a string
  @@ -161,13 +161,13 @@ int main()
  // Create the Interfaces
  for( index_t interface_itr = 0; interface_itr < nb_interfaces; interface_itr++ ) {
  - builder.topology.create_geological_entity(
  + builder.geology.create_geological_entity(
  Interface::type_name_static() ) ;
  }
  // Create the Layers
  for( index_t layer = 0; layer < nb_layers; layer++ ) {
  - builder.topology.create_geological_entity( Layer::type_name_static() ) ;
  + builder.geology.create_geological_entity( Layer::type_name_static() ) ;
  }
  // Then we create the GeoModelMEshEntity
  