Organize the engine/ directory, take 3

Renamed `title` to `movies`.
Moved some functions from `engine/routines/` to their fitting
directories, and cleaned up the base `engine/` directory.
Moved `engine/pokemon/tmhm.asm` back to `engine/items/`.

Made a new subdirectory:
* engine/tilesets: Contains all map-related graphics routines.

engine/tilesets/tileset_palettes.asm

@@ -0,0 +1,151 @@
+LoadSpecialMapPalette: ; 494ac
+	ld a, [wMapTileset]
+	cp TILESET_POKECOM_CENTER
+	jr z, .pokecom_2f
+	cp TILESET_BATTLE_TOWER
+	jr z, .battle_tower
+	cp TILESET_ICE_PATH
+	jr z, .ice_path
+	cp TILESET_HOUSE
+	jr z, .house
+	cp TILESET_RADIO_TOWER
+	jr z, .radio_tower
+	cp TILESET_MANSION
+	jr z, .mansion_mobile
+	jr .do_nothing
+
+.pokecom_2f
+	call LoadPokeComPalette
+	scf
+	ret
+
+.battle_tower
+	call LoadBattleTowerPalette
+	scf
+	ret
+
+.ice_path
+	ld a, [wEnvironment]
+	and $7
+	cp INDOOR ; Hall of Fame
+	jr z, .do_nothing
+	call LoadIcePathPalette
+	scf
+	ret
+
+.house
+	call LoadHousePalette
+	scf
+	ret
+
+.radio_tower
+	call LoadRadioTowerPalette
+	scf
+	ret
+
+.mansion_mobile
+	call LoadMansionPalette
+	scf
+	ret
+
+.do_nothing
+	and a
+	ret
+; 494f2
+
+LoadPokeComPalette: ; 494f2
+	ld a, BANK(wBGPals1)
+	ld de, wBGPals1
+	ld hl, PokeComPalette
+	ld bc, 8 palettes
+	call FarCopyWRAM
+	ret
+; 49501
+
+PokeComPalette: ; 49501
+INCLUDE "gfx/tilesets/pokecom_center.pal"
+; 49541
+
+LoadBattleTowerPalette: ; 49541
+	ld a, BANK(wBGPals1)
+	ld de, wBGPals1
+	ld hl, BattleTowerPalette
+	ld bc, 8 palettes
+	call FarCopyWRAM
+	ret
+; 49550
+
+BattleTowerPalette: ; 49550
+INCLUDE "gfx/tilesets/battle_tower.pal"
+; 49590
+
+LoadIcePathPalette: ; 49590
+	ld a, BANK(wBGPals1)
+	ld de, wBGPals1
+	ld hl, IcePathPalette
+	ld bc, 8 palettes
+	call FarCopyWRAM
+	ret
+; 4959f
+
+IcePathPalette: ; 4959f
+INCLUDE "gfx/tilesets/ice_path.pal"
+; 495df
+
+LoadHousePalette: ; 495df
+	ld a, BANK(wBGPals1)
+	ld de, wBGPals1
+	ld hl, HousePalette
+	ld bc, 8 palettes
+	call FarCopyWRAM
+	ret
+; 495ee
+
+HousePalette: ; 495ee
+INCLUDE "gfx/tilesets/house.pal"
+; 4962e
+
+LoadRadioTowerPalette: ; 4962e
+	ld a, BANK(wBGPals1)
+	ld de, wBGPals1
+	ld hl, RadioTowerPalette
+	ld bc, 8 palettes
+	call FarCopyWRAM
+	ret
+; 4963d
+
+RadioTowerPalette: ; 4963d
+INCLUDE "gfx/tilesets/radio_tower.pal"
+; 4967d
+
+MansionPalette1: ; 4967d
+INCLUDE "gfx/tilesets/mansion_1.pal"
+; 496c5
+
+LoadMansionPalette: ; 496c5
+	ld a, BANK(wBGPals1)
+	ld de, wBGPals1
+	ld hl, MansionPalette1
+	ld bc, 8 palettes
+	call FarCopyWRAM
+	ld a, BANK(wBGPals1)
+	ld de, wBGPals1 palette PAL_BG_YELLOW
+	ld hl, MansionPalette2
+	ld bc, 1 palettes
+	call FarCopyWRAM
+	ld a, BANK(wBGPals1)
+	ld de, wBGPals1 palette PAL_BG_WATER
+	ld hl, MansionPalette1 + 6 palettes
+	ld bc, 1 palettes
+	call FarCopyWRAM
+	ld a, BANK(wBGPals1)
+	ld de, wBGPals1 palette PAL_BG_ROOF
+	ld hl, MansionPalette1 + 8 palettes
+	ld bc, 1 palettes
+	call FarCopyWRAM
+	ret
+; 496fe
+
+MansionPalette2: ; 496fe
+INCLUDE "gfx/tilesets/mansion_2.pal"
+; 49706