createPlaceObject() because it needs to fall back to PlaceManager's
createPlaceObject() which calls getPlaceObjectClass() which all GG games
currently use.
It doesn't really make sense for GameManager to implement that method anyway
because no one will ever just use a GameObject, they'll need some sort of
derivation if they want to have any game state at all.
Really that method should be abstract in PlaceManager and GameManager but I'm
not sure we could change that now without breaking things (certainly we
couldn't preserve backwards compability which renders the idea moot anyway).
git-svn-id: svn+ssh://src.earth.threerings.net/vilya/trunk@59 c613c5cb-e716-0410-b11b-feb51c14d237
Michael Bayne
e03ffd02bc