OoT Entrance Randomizer (#125)

Add options:
    "shuffle_grotto_entrances": GrottoEntrances,
    "shuffle_dungeon_entrances": DungeonEntrances,
    "owl_drops": OwlDrops,
    "warp_songs": WarpSongs,
    "spawn_positions": SpawnPositions,
Add Logic Trick:
    "Skip King Zora as Adult with Nothing"

worlds/oot/Entrance.py

@@ -5,8 +5,9 @@ from .Regions import TimeOfDay
 class OOTEntrance(Entrance): 
     game: str = 'Ocarina of Time'
 
-    def __init__(self, player, name='', parent=None): 
+    def __init__(self, player, world, name='', parent=None): 
         super(OOTEntrance, self).__init__(player, name, parent)
+        self.world = world
         self.access_rules = []
         self.reverse = None
         self.replaces = None
@@ -17,3 +18,27 @@ class OOTEntrance(Entrance):
         self.primary = False
         self.always = False
         self.never = False
+
+    def bind_two_way(self, other_entrance):
+        self.reverse = other_entrance
+        other_entrance.reverse = self
+
+    def disconnect(self):
+        self.connected_region.entrances.remove(self)
+        previously_connected = self.connected_region
+        self.connected_region = None
+        return previously_connected
+
+    def get_new_target(self):
+        root = self.world.get_region('Root Exits', self.player)
+        target_entrance = OOTEntrance(self.player, self.world, 'Root -> ' + self.connected_region.name, root)
+        target_entrance.connect(self.connected_region)
+        target_entrance.replaces = self
+        root.exits.append(target_entrance)
+        return target_entrance
+
+    def assume_reachable(self):
+        if self.assumed == None:
+            self.assumed = self.get_new_target()
+            self.disconnect()
+        return self.assumed