Line of sight now works, and is required to look at things. Foundations for NPCs has also been laid.

gameevents.py

@@ -98,3 +98,8 @@ class DropEvent(GameEvent):
     def __init__(self, item):
         super(DropEvent, self).__init__('drop')
         self.item = item
+
+class BehaveEvent(GameEvent):
+    def __init__(self, actor):
+        super(BehaveEvent, self).__init__('behave')
+        self.actor = actor