update docs

docs/examples/exporters/PLYExporter.html

@@ -41,9 +41,10 @@
 
 		<h2>Methods</h2>
 
-		<h3>[method:null parse]( [param:Object3D input], [param:Object options] )</h3>
+		<h3>[method:null parse]( [param:Object3D input], [param:Function onCompleted], [param:Object options] )</h3>
 		<p>
 		[page:Object input] — Object3D<br />
+		[page:Function onCompleted] — Will be called when the export completes. The argument will be the generated ply ascii or binary ArrayBuffer.<br />
 		[page:Options options] — Export options<br />
 		<ul>
 			<li>excludeAttributes - array. Which properties to explicitly exclude from the exported PLY file. Valid values are 'color', 'normal', 'uv', and 'index'. If triangle indices are excluded, then a point cloud is exported. Default is an empty array.</li>
@@ -51,7 +52,8 @@
 		</ul>
 		</p>
 		<p>
-		Generates ply file data as string or ArrayBuffer (ascii or binary) output from the input object.
+		Generates ply file data as string or ArrayBuffer (ascii or binary) output from the input object. The data that is returned is the same
+		that is passed into the "onCompleted" function.
 		If the object is composed of multiple children and geometry, they are merged into a single mesh in the file.
 		</p>