Replace GT, Ganon vuln crystal checks, ped check with new system

InvincibleGanon 0x18003E -> GanonVulnerableMode 0x1801A8-0x1801A9
NumberOfCrystalsRequiredForTower 0x18005E -> GanonsTowerOpenTarget 0x18019A-0x18019B
NumberOfCrystalsRequiredForGanon 0x18005F -> GanonVulnerableTarget 0x1801A6-0x1801A7
Various fixes
Moved CrystalCounter to word length space $7EF471 -> $7EF476

inventory.asm

@@ -168,6 +168,7 @@ AddInventory:
 RTL
 
 ShopCheck:
+; TODO: If we write all shops, we can use the ShopPurchase flag instead of this
         LDA.b IndoorsFlag : BEQ .count
         LDA.w ItemReceiptMethod : CMP.b #$01 : BEQ .count
         LDA.w InventoryTable_properties,Y : BIT.b #$02 : BNE .count