Anti-Aliasing example

Readme.md

@@ -114,13 +114,17 @@ Given one of the values below will alter pattern (gradients, images, etc) render
 
 ## Anti-Aliasing
 
- Set anti-aliasing mode:
+ Set anti-aliasing mode
  
  - default
  - none
  - gray
  - subpixel
 
+ For example:
+ 
+   ctx.antialias = 'none';
+
 ## Benchmarks
 
  Although node-canvas is extremely new, and we have not even begun optimization yet it is already quite fast. For benchmarks vs other node canvas implementations view this [gist](https://gist.github.com/664922), or update the submodules and run `$ make benchmark` yourself.