Merge pull request #4961 from gero3/patch-19

add uuid to docs

docs/api/core/Object3D.html

@@ -25,7 +25,13 @@
 
 		<h3>.[page:Integer id]</h3>
 		<div>
-		Unique number of this object instance.
+		Identifier of this object instance.
+		</div>
+		
+		<h3>.[page:String uuid]</h3>
+		<div>
+		[link:http://en.wikipedia.org/wiki/Universally_unique_identifier UUID] of this object instance. 
+		This gets automatically assigned, so this shouldn't be edited.
 		</div>
 
 		<h3>.[page:String name]</h3>