Support for Directions

[elaintarha]

Currently there is no module that supports DirectionsService for obtaining and rendering a route between points. This would be hugely useful feature!

https://developers.google.com/maps/documentation/javascript/directions

Example of use:
`
function initMap() {
var directionsService = new google.maps.DirectionsService();
var directionsRenderer = new google.maps.DirectionsRenderer();
var chicago = new google.maps.LatLng(41.850033, -87.6500523);
var mapOptions = {
zoom:7,
center: chicago
}
var map = new google.maps.Map(document.getElementById('map'), mapOptions);
directionsRenderer.setMap(map);
}

function calcRoute() {
var start = document.getElementById('start').value;
var end = document.getElementById('end').value;
var request = {
origin: start,
destination: end,
travelMode: 'DRIVING'
};
directionsService.route(request, function(result, status) {
if (status == 'OK') {
directionsRenderer.setDirections(result);
}
});
}
`

[paodb]

The web-component part already have support for directions, so the complexity would be to create a Java API to handle that. I did some testing adding the apikey as requested but I'm getting this errors in console:

I think we need to follow these instructions to enable the service. Is this something we can do @mlopezFC? Also in the next section it mentions "pricing". The Directions API uses a pay-as-you-go pricing model as explained here so, would it be okay to move forward with this?