Add an id on Entities

dream/simulation/Entity.py

@@ -32,6 +32,7 @@ class Entity(object):
     type="Entity"
 
     def __init__(self, id=None, name=None, priority=0, dueDate=None, orderDate=None, isCritical=False):
+        self.id = id
         self.name=name
         #         information on the object holding the entity
         #         initialized as None and updated every time an entity enters a new object