Get sprite json from vt.alttp.run

Fix plando's sprite support

Always write both sprite and pallet (using the default if a sprite does
not include a pallet)
so that the adjuster still works.

Plando.py

@@ -9,7 +9,7 @@ import sys
 from BaseClasses import World
 from Regions import create_regions
 from EntranceShuffle import link_entrances, connect_entrance, connect_two_way, connect_exit
-from Rom import patch_rom, LocalRom, write_string_to_rom
+from Rom import patch_rom, LocalRom, Sprite, write_string_to_rom
 from Rules import set_rules
 from Dungeons import create_dungeons
 from Items import ItemFactory
@@ -75,7 +75,7 @@ def main(args):
     logger.info('Patching ROM.')
 
     if args.sprite is not None:
-        sprite = bytearray(open(args.sprite, 'rb').read())
+        sprite = Sprite(args.sprite)
     else:
         sprite = None