Update code samples

Former-commit-id: 803758f4797787da937f26d82026a60d92662cdd
Former-commit-id: 0d3f16fdaeb2ba7ab1c1d236910d0eb1164ed107
Former-commit-id: 16199f78ef84495eb55db990f6561c0928209b22

README.md

@@ -166,8 +166,8 @@ Here's an example of the code required to resize an image using the default Bicu
 ```csharp
 using (FileStream stream = File.OpenRead("foo.jpg"))
 using (FileStream output = File.OpenWrite("bar.jpg"))
-using (Image image = new Image(stream))
 {
+    Image image = new Image(stream);
     image.Resize(image.Width / 2, image.Height / 2)
          .Greyscale()
          .Save(output);
@@ -179,8 +179,8 @@ It will also be possible to pass collections of processors as params to manipula
 ```csharp
 using (FileStream stream = File.OpenRead("foo.jpg"))
 using (FileStream output = File.OpenWrite("bar.jpg"))
-using (Image image = new Image(stream))
 {
+    Image image = new Image(stream);
     List<IImageProcessor> processors = new List<IImageProcessor>()
     {
         new GuassianBlur(5),