Simple key logic for Escape

Adds ability to make a location for required keys (enemy drops and pots), so the filler knows about them.

Uses the most pessimistic possible rule to make sure you can't keylock yourself in Escape.

BaseClasses.py

@@ -898,17 +898,24 @@ class Boss(object):
         return self.defeat_rule(state, self.player)
 
 class Location(object):
-    def __init__(self, player, name='', address=None, crystal=False, hint_text=None, parent=None):
+    def __init__(self, player, name='', address=None, crystal=False, hint_text=None, parent=None, forced_item=None):
         self.name = name
         self.parent_region = parent
-        self.item = None
+        if forced_item is not None:
+          from Items import ItemFactory
+          self.forced_item = ItemFactory([forced_item], player)[0]
+          self.item = self.forced_item
+          self.event = True
+        else:
+          self.forced_item = None
+          self.item = None
+          self.event = False
         self.crystal = crystal
         self.address = address
         self.spot_type = 'Location'
         self.hint_text = hint_text if hint_text is not None else 'Hyrule'
         self.recursion_count = 0
         self.staleness_count = 0
-        self.event = False
         self.locked = True
         self.always_allow = lambda item, state: False
         self.access_rule = lambda state: True