Leaflet API simplification proposal

current-api.js

var map = new L.Map('map');
map.setView(new L.LatLng(51.505, -0.09), 13);

var cloudmade = new L.TileLayer('http://{s}.tile.cloudmade.com/.../{z}/{x}/{y}.png', {
    attribution: '[...]'
});
map.addLayer(cloudmade);

var marker = new L.Marker(new L.LatLng(51.5, -0.09));
marker.bindPopup("<b>Hello world!</b><br />I am a popup.").openPopup();
map.addLayer(marker);

var circle = new L.Circle(new L.LatLng(51.508, -0.11), 500, {color: '#f03', opacity: 0.7});
circle.bindPopup("I am a circle.");
map.addLayer(circle);

var polygon = new L.Polygon([
    new L.LatLng(51.509, -0.08), 
    new L.LatLng(51.503, -0.06), 
    new L.LatLng(51.51, -0.047)
]);
polygon.bindPopup("I am a polygon.");
map.addLayer(polygon);

simplified-api.js

var map = L.map('map').setView([51.505, -0.09], 13);

var cloudmade = L.tileLayer('http://{s}.tile.cloudmade.com/.../{z}/{x}/{y}.png', {
    attribution: '[...]'
}).addTo(map);

L.marker([51.5, -0.09])
    .bindPopup("<b>Hello world!</b><br />I am a popup.")
    .addTo(map)
    .openPopup();

L.circle([51.508, -0.11], 500, {color: '#f03', opacity: 0.7})
    .bindPopup("I am a circle.")
    .addTo(map);

L.polygon([
    [51.509, -0.08], 
    [51.503, -0.06], 
    [51.51, -0.047]])
    .bindPopup("I am a polygon.")
    .addTo(map);

Yep, all method that don't explicitly return some value (like getCenter) return the object itself for chaining.