This archive contains: README - this file equations.ps - equations from the paper fig_p1.ps - first page of figures (B&W Fig. 1, 2 and 3) fig_p2.ps - second page of figures (B&W Fig. 4, 6, 7, 8 and 11) fig_p3.ps - third page of figures (Color Fig. 5a, 5b and 5c) fig_p4.ps - fourth page of figures (Color Fig. 9a, 9b, 9c and 10) finaltxt.ps - paper text, minus equations and figures