I made a pull request for issue 107 - when the user hasn't set a display
name Speaker is shown, but this is confusing because there a few speakers
and there is no clear indication who the dominant speaker is. I have
changed it so now if the user doesn't have a display name "Fellow jitster"
is shown and if the is currently the dominant speaker only then "Speaker"
is shown. Could anybody review and merge it, thanks.