Beginnings of Retro Mode

This just adds a GUI/command line option to set the variable into world for retro mode and puts the universal key item into the list of defined items. None of the functionality is yet present.

BaseClasses.py

@@ -7,7 +7,7 @@ from collections import OrderedDict
 
 class World(object):
 
-    def __init__(self, shuffle, logic, mode, difficulty, timer, progressive, goal, algorithm, place_dungeon_items, check_beatable_only, shuffle_ganon, quickswap, fastmenu, disable_music, keysanity, custom, customitemarray):
+    def __init__(self, shuffle, logic, mode, difficulty, timer, progressive, goal, algorithm, place_dungeon_items, check_beatable_only, shuffle_ganon, quickswap, fastmenu, disable_music, keysanity, retro, custom, customitemarray):
         self.shuffle = shuffle
         self.logic = logic
         self.mode = mode
@@ -56,6 +56,7 @@ class World(object):
         self.fastmenu = fastmenu
         self.disable_music = disable_music
         self.keysanity = keysanity
+        self.retro = retro
         self.custom = custom
         self.customitemarray = customitemarray
         self.can_take_damage = True
@@ -278,6 +279,7 @@ class World(object):
         markbool(self.check_beatable_only)
         markbool(self.shuffle_ganon)
         markbool(self.keysanity)
+        markbool(self.retro)
         assert id_value_max <= 0xFFFFFFFF
         return id_value