Switch example page to use viewBox to size correctly on smaller screens
Switch example page to use viewBox to size correctly on smaller screens

fxcebx/d3fc,bjedrzejewski/d3fc,alisd23/d3fc-d3v4,djmiley/d3fc,bjedrzejewski/d3fc,fxcebx/d3fc,bjedrzejewski/d3fc,djmiley/d3fc,alisd23/d3fc-d3v4,alisd23/d3fc-d3v4,fxcebx/d3fc,djmiley/d3fc