Partial implementation of many V31 features

Partial support for Progressive bow
  - Still needs to be added to item pool
  - Silver hint handling remains TBD even for VT

Added weapons selection.
  - Vanilla needs to be implemented
  - Assured needs to be implemented
  - Inverted swordless is almost certainly messed up.
  - Swordless standard mode will likely softlock
  - Random weapon standard mode is currently treated as uncle assured

Deleted removed difficulties
  - Remaining difficulties still need to be adjusted

Added locked property to locations:
  - This is used for preplaced items etc so that multiworld balancing
    knows they cannot be moved.

Made a few of the difficulty changes from V31, but not all.

Added required text changes to handle crystals requirements
  - More changes will likely me made in future
  - Currently there is is no way to tell ganon requirement in
    Inverted mode

Fill.py

@@ -374,6 +374,9 @@ def balance_multiworld_progression(world):
 
                         reducing_state.sweep_for_events(locations=locations_to_test)
 
+                        if testing.locked:
+                            continue
+
                         if world.has_beaten_game(balancing_state):
                             if not world.has_beaten_game(reducing_state):
                                 items_to_replace.append(testing)
@@ -383,7 +386,7 @@ def balance_multiworld_progression(world):
                                 items_to_replace.append(testing)
 
                 replaced_items = False
-                locations_for_replacing = [l for l in checked_locations if not l.event]
+                locations_for_replacing = [l for l in checked_locations if not l.event and not l.locked]
                 while locations_for_replacing and items_to_replace:
                     new_location = locations_for_replacing.pop()
                     old_location = items_to_replace.pop()