README: Fixed typo.

README.md

@@ -3,7 +3,7 @@ three.js
 
 #### JavaScript 3D library ####
 
-The aim of the project is to create a easy to use, lightweight, 3D library. The library provides <canvas>, <svg>, CSS3D and WebGL renderers.
+The aim of the project is to create an easy to use, lightweight, 3D library. The library provides <canvas>, <svg>, CSS3D and WebGL renderers.
 
 [Examples](http://threejs.org/examples/) — [Documentation](http://threejs.org/docs/) — [Migrating](https://github.com/mrdoob/three.js/wiki/Migration) — [Help](http://stackoverflow.com/questions/tagged/three.js)