Add vectortile branch

vectortile/examples/xyz-esri-4326-512.js

@@ -0,0 +1,37 @@
+var attribution = new ol.Attribution({
+  html: 'Copyright:© 2013 ESRI, i-cubed, GeoEye'
+});
+
+var projection = ol.proj.get('EPSG:4326');
+
+// The tile size supported by the ArcGIS tile service.
+var tileSize = 512;
+
+var urlTemplate = 'http://services.arcgisonline.com/arcgis/rest/services/' +
+    'ESRI_Imagery_World_2D/MapServer/tile/{z}/{y}/{x}';
+
+var map = new ol.Map({
+  target: 'map',
+  layers: [
+    new ol.layer.Tile({
+      source: new ol.source.XYZ({
+        attributions: [attribution],
+        maxZoom: 16,
+        projection: projection,
+        tileSize: tileSize,
+        tileUrlFunction: function(tileCoord) {
+          return urlTemplate.replace('{z}', (tileCoord[0] - 1).toString())
+                            .replace('{x}', tileCoord[1].toString())
+                            .replace('{y}', (-tileCoord[2] - 1).toString());
+        },
+        wrapX: true
+      })
+    })
+  ],
+  view: new ol.View({
+    center: [0, 0],
+    projection: projection,
+    zoom: 2,
+    minZoom: 2
+  })
+});