Add teal and purple chase car icons

Author: Mark Jessop

img/markers/car-purple.png

@@ -63,7 +63,7 @@ var graph_vehicle = null;
 var manual_pan = false;
 
 var car_index = 0;
-var car_colors = ["blue", "red", "green", "yellow"];
+var car_colors = ["blue", "red", "green", "yellow", "teal", "purple"];
 var balloon_index = 0;
 var balloon_colors_name = ["red", "blue", "green", "yellow", "purple", "orange", "cyan"];
 var balloon_colors = ["#f00", "blue", "green", "#FDFC30", "#c700e6", "#ff8a0f", "#0fffca"];