VMOU: more new words and signs

Otter's new signs: LABEL (for tag), SLIDE, BREAD, BEAR (with an 'RRRR' sound), RING (for the chime next to his highchair)

Otter's new words: rainbow (as bobo), paper, burger, turtle, Nana, Grammy, puppet, hug, Loki, kiwi (which varies between teewee, teepee, and peewee--but he's getting there and we can tell what he means), clock, chime