Method for getting both feature id and data.

Having to call two methods to get complete feature information (id and data) is cumbersome.  The `getFeatureInfo` method returns an object with both feature id and data.

lib/OpenLayers/Control/UTFGrid.js

@@ -33,7 +33,7 @@
  * var control = new OpenLayers.Control.UTFGrid({
  *     layers: [world_utfgrid],
  *     handlerMode: 'move',
- *     callback: function(dataLookup) {
+ *     callback: function(infoLookup) {
  *         // do something with returned data
  *
  *     }
@@ -175,14 +175,14 @@ OpenLayers.Control.UTFGrid = OpenLayers.Class(OpenLayers.Control, {
         
         var layers = this.findLayers();
         if (layers.length > 0) {
-            var dataLookup = {};
+            var infoLookup = {};
             var layer, idx;
             for (var i=0, len=layers.length; i<len; i++) {
                 layer = layers[i];
                 idx = this.map.layers.indexOf(layer);
-                dataLookup[idx] = layer.getFeatureData(lonLat);
+                infoLookup[idx] = layer.getFeatureInfo(lonLat);
             }
-            this.callback(dataLookup); // perhaps pass tile, lonLat?
+            this.callback(infoLookup); // perhaps pass tile, lonLat?
         }
     },
 
@@ -192,12 +192,12 @@ OpenLayers.Control.UTFGrid = OpenLayers.Class(OpenLayers.Control, {
      *     includes data in one of the configured UTFGrid layers.
      *
      * Parameters:
-     * dataLookup - {Object} Keys of this object are layer indexes and can be
+     * infoLookup - {Object} Keys of this object are layer indexes and can be
      *     used to resolve a layer in the map.layers array.  The structure of
      *     the property values depend on the data included in the underlying
      *     UTFGrid and may be any valid JSON type.  
      */
-    callback: function(dataLookup) {
+    callback: function(infoLookup) {
         // to be provided in the constructor
     },