The socket browsers watching scenes connect through, with the channel
Cauldron3D.Net.Channel defines.
defmodule MyGame.Web.SceneSocket do
use Cauldron3D.Net.Socket, channel: MyGame.Web.SceneChannel
end:topic is the channel's topic prefix (default "scene"). :verify, a {module, function} given the connect params and answering {:ok, assigns} or :error, decides
who may connect; without it everyone may.