Update README.md

Author: briangonzalez

README.md

@@ -1,5 +1,10 @@
-<img src='http://briangonzalez.github.io/jquery.adaptive-backgrounds.js/favicon.png?2' height='30'> jquery.adaptive-backgrounds.js
-===============================
+<p align='center'>
+  <img src='http://briangonzalez.github.io/jquery.adaptive-backgrounds.js/favicon.png?2'>
+</p>
+
+jquery.adaptive-backgrounds.js
+------------------------------
+
 _A simple jQuery plugin to extract the dominant color of an image and apply it to the background of its parent element._
 
 **[Check it out on the web!](http://briangonzalez.github.io/jquery.adaptive-backgrounds.js/)**