Don't use black for gaia on survival of the fittest, refs #3102.
Some GUI elements use white until the first diplomacy change.
The choice black is confusing, problematic as there is a dark gray player color and
problematic as black words in the chat have no contrast to the black background.
Changing playercolors in running games is a questionable feature, thus don't attempt to inform the GUI via a GUIInterface notification now.
git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@18914 3db68df2-c116-0410-a063-a993310a9797