document new method

docs/api/renderers/WebGLRenderer.html

@@ -354,6 +354,9 @@
 		<h3>[method:string getPrecision]()</h3>
 		<div>This gets the precision used by the shaders. It returns "highp","mediump" or "lowp".</div>
 
+		<h3>[method:WebGLRenderLists getRenderLists]()</h3>
+		<div>Returns the renderer's internal WebGLRenderLists object.</div>
+
 		<h3>[method:Object getSize]()</h3>
 		<div>Returns an object containing the width and height of the renderer's output canvas, in pixels.</div>