Update README.md

Author: Hinerangi Courtenay

README.md

@@ -6,5 +6,7 @@ A little PHP placeholder image generator (GD support must be enabled).
 Usage (all parameters are optional): <br>
 &lt;img src="placeholder.php?size=400x150&bg=eee&fg=999&text=Generated+image" alt="Placeholder image" /&gt;
 
+See demos: http://skymaiden.github.io/php-placeholder-images/
+
 
 Inspired by http://placehold.it/