anagrams: Have the server auto deal up to 7 tiles to the center

anagrams: Have the server auto deal up to 7 tiles to the center

Until there are a few tiles out on the board, it's silly to make the
players press the bag button. Once there are 7 or more it's reasonable
to have the game slow down (no more auto deal) and let players either
find anagrams from what's there, or else grab new tiles from the bag.