Move all code out of home.asm into home/

This results in 64 home/*.asm files, comparable to pokecrystal's 57.

home/inventory.asm

@@ -0,0 +1,55 @@
+; subtracts the amount the player paid from their money
+; OUTPUT: carry = 0(success) or 1(fail because there is not enough money)
+SubtractAmountPaidFromMoney::
+	farjp SubtractAmountPaidFromMoney_
+
+; adds the amount the player sold to their money
+AddAmountSoldToMoney::
+	ld de, wPlayerMoney + 2
+	ld hl, hMoney + 2 ; total price of items
+	ld c, 3 ; length of money in bytes
+	predef AddBCDPredef ; add total price to money
+	ld a, MONEY_BOX
+	ld [wTextBoxID], a
+	call DisplayTextBoxID ; redraw money text box
+	ld a, SFX_PURCHASE
+	call PlaySoundWaitForCurrent
+	jp WaitForSoundToFinish
+
+; function to remove an item (in varying quantities) from the player's bag or PC box
+; INPUT:
+; HL = address of inventory (either wNumBagItems or wNumBoxItems)
+; [wWhichPokemon] = index (within the inventory) of the item to remove
+; [wItemQuantity] = quantity to remove
+RemoveItemFromInventory::
+	ldh a, [hLoadedROMBank]
+	push af
+	ld a, BANK(RemoveItemFromInventory_)
+	ldh [hLoadedROMBank], a
+	ld [MBC1RomBank], a
+	call RemoveItemFromInventory_
+	pop af
+	ldh [hLoadedROMBank], a
+	ld [MBC1RomBank], a
+	ret
+
+; function to add an item (in varying quantities) to the player's bag or PC box
+; INPUT:
+; HL = address of inventory (either wNumBagItems or wNumBoxItems)
+; [wcf91] = item ID
+; [wItemQuantity] = item quantity
+; sets carry flag if successful, unsets carry flag if unsuccessful
+AddItemToInventory::
+	push bc
+	ldh a, [hLoadedROMBank]
+	push af
+	ld a, BANK(AddItemToInventory_)
+	ldh [hLoadedROMBank], a
+	ld [MBC1RomBank], a
+	call AddItemToInventory_
+	pop bc
+	ld a, b
+	ldh [hLoadedROMBank], a
+	ld [MBC1RomBank], a
+	pop bc
+	ret