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

Gui.py

@@ -145,7 +145,7 @@ def guiMain(args=None):
     modeFrame = Frame(drowDownFrame)
     modeVar = StringVar()
     modeVar.set('open')
-    modeOptionMenu = OptionMenu(modeFrame, modeVar, 'standard', 'open', 'swordless', 'inverted')
+    modeOptionMenu = OptionMenu(modeFrame, modeVar, 'standard', 'open', 'inverted')
     modeOptionMenu.pack(side=RIGHT)
     modeLabel = Label(modeFrame, text='Game Mode')
     modeLabel.pack(side=LEFT)
@@ -169,7 +169,7 @@ def guiMain(args=None):
     difficultyFrame = Frame(drowDownFrame)
     difficultyVar = StringVar()
     difficultyVar.set('normal')
-    difficultyOptionMenu = OptionMenu(difficultyFrame, difficultyVar, 'easy', 'normal', 'hard', 'expert', 'insane')
+    difficultyOptionMenu = OptionMenu(difficultyFrame, difficultyVar, 'normal', 'hard', 'expert')
     difficultyOptionMenu.pack(side=RIGHT)
     difficultyLabel = Label(difficultyFrame, text='Game difficulty')
     difficultyLabel.pack(side=LEFT)