add two todos to change name into material_name in the layer class

hub/city_model_structure/building_demand/layer.py

@@ -59,6 +59,7 @@ class Layer:
     Get material name
     :return: str
     """
+    # todo: this should be named material_name instead
     return self._name
 
   @name.setter
@@ -67,6 +68,7 @@ class Layer:
     Set material name
     :param value: string
     """
+    # todo: this should be named material_name instead
     self._name = str(value)
 
   @property