Added code to replace tee and basket marker icons with polyline arrows

Since this would have removed the ability for the user to figure out which hole was which (no marker to tap), this change includes the complicated changes needed to be able to tap the polyline and get a marker info window pop-up.  Surprisingly, Google doesn't provide this functionality at all, so many hoops were jumped through.  For more details, consult the message for a613bb2.