Hiding "Drop from Trip" if the placemark has not been added to the trip.
Adding marker parameter to wrapInfowindow so lat and lng can be calculated at time of creating removebutton, or the Drop from Trip button.
Fixing logic when gd-startAddress is empty to prompt user for an address.
Commenting out showSteps for now since it is not finished. The idea is to suppress the green A, B… direction markers and place the markers manually inside showSteps with the same images that match A, B… from the results div.