Exlicitly get the pseudonamespace with all shared lists (#32)

pkg/models/namespace_delete.go

@@ -45,7 +45,7 @@ func (n *Namespace) Delete() (err error) {
 	}
 
 	// Delete all lists with their tasks
-	lists, err := GetListsByNamespaceID(n.ID)
+	lists, err := GetListsByNamespaceID(n.ID, &User{})
 	var listIDs []int64
 	// We need to do that for here because we need the list ids to delete two times:
 	// 1) to delete the lists itself