More tweaks to README

README.md

@@ -5,9 +5,8 @@ three.js
 
 The aim of this project is to create a lightweight 3D engine with a very low level of abstraction (for dummies). The engine can render using <canvas>, <svg> and WebGL.
 
-([API Reference](https://github.com/mrdoob/three.js/wiki/API-Reference---r33))
-
 Be aware that the API may change from revision to revision breaking backwards compatibility.
+[API Reference](https://github.com/mrdoob/three.js/wiki/r33-API-Reference)
 
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