Network: Add scenario support.

src/Model/Network/Node.py

@@ -23,7 +23,7 @@ from Model.Network.Point import Point
 class Node(PamhyrID):
     def __init__(self, id: int, name: str,
                  x: float = 0.0, y: float = 0.0,
-                 status=None):
+                 status=None, **kwargs):
         super(Node, self).__init__(id)
 
         self._status = status
@@ -55,6 +55,9 @@ class Node(PamhyrID):
 
         self._status.modified()
 
+    def is_deleted(self):
+        return False
+
     @property
     def name(self):
         return self._name