The Witness: Renaming, Options, Logic Fixes (#1000)

Fixes to postgame detection for "shuffle_postgame"
Renamed many locations to be symbol-independent ("Outside Tutorial Dots Introduction" becomes "Outside Tutorial Shed Row"). This is to set up future alternate modes, like Sigma Expert, which use completely different symbols.
Renamed most door items to be shorter, more consistent, and less... stupid. ("Bunker Bunker Entry Door" -> "Bunker Entry")
Removed "shuffle_uncommon"
Many logic fixes

worlds/witness/__init__.py

@@ -36,7 +36,7 @@ class WitnessWorld(World):
     """
     game = "The Witness"
     topology_present = False
-    data_version = 5
+    data_version = 7
 
     static_logic = StaticWitnessLogic()
     static_locat = StaticWitnessLocations()