Move all code out of home.asm into home/

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

home/hidden_objects.asm

@@ -0,0 +1,39 @@
+UpdateCinnabarGymGateTileBlocks::
+	farjp UpdateCinnabarGymGateTileBlocks_
+
+CheckForHiddenObjectOrBookshelfOrCardKeyDoor::
+	ldh a, [hLoadedROMBank]
+	push af
+	ldh a, [hJoyHeld]
+	bit 0, a ; A button
+	jr z, .nothingFound
+; A button is pressed
+	ld a, BANK(CheckForHiddenObject)
+	ld [MBC1RomBank], a
+	ldh [hLoadedROMBank], a
+	call CheckForHiddenObject
+	ldh a, [hDidntFindAnyHiddenObject]
+	and a
+	jr nz, .hiddenObjectNotFound
+	ld a, [wHiddenObjectFunctionRomBank]
+	ld [MBC1RomBank], a
+	ldh [hLoadedROMBank], a
+	ld de, .returnAddress
+	push de
+	jp hl
+.returnAddress
+	xor a
+	jr .done
+.hiddenObjectNotFound
+	farcall PrintBookshelfText
+	ldh a, [hFFDB]
+	and a
+	jr z, .done
+.nothingFound
+	ld a, $ff
+.done
+	ldh [hItemAlreadyFound], a
+	pop af
+	ld [MBC1RomBank], a
+	ldh [hLoadedROMBank], a
+	ret