except for wram.asm and sram.asm
also delete unused yellow file

Use OPP_ constants separate from trainer constants since
valid opponents can be all Pokemon and trainers

swap LEFT and RIGHT
FACE is better named STAY because sprites that have no range do not
necessarily face any direction
STAY has been renamed to NONE because sprites that use this will
spin randomly, except for the item/voltorb/electrode sprite

I never should have listened to https://github.com/iimarckus/pokered/issues/89

closes https://github.com/iimarckus/pokered/issues/89