Added image resize example

currently takes about 17ms

examples/resize.js

@@ -0,0 +1,29 @@
+
+/**
+ * Module dependencies.
+ */
+
+var Canvas = require('../lib/canvas')
+  , Image = Canvas.Image
+  , fs = require('fs');
+
+var img = new Image
+  , start = new Date;
+
+img.onerror = function(err){
+  throw err;
+};
+
+img.onload = function(){
+  var canvas = new Canvas(img.width / 2, img.height / 2)
+    , ctx = canvas.getContext('2d');
+  ctx.drawImage(img, 0, 0, img.width / 2, img.height / 2);
+  canvas.toBuffer(function(err, buf){
+    fs.writeFile(__dirname + '/resize.png', buf, function(){
+      console.log('Resized and saved in %dms', new Date - start);
+    });
+  });
+};
+
+img.src = __dirname + '/images/squid.png';
+