Added a comment on `example/large_mesh_test.html` about the `--allow-file-access-from-files` bit.

examples/large_mesh_test.html

@@ -40,6 +40,7 @@
 			<br/>
 			<p>Best viewed in Chrome 8/9 or Firefox 4 using WebGL renderer.
 			<p>Canvas renderer is very slow for this demo and only diffuse material works there.
+			<p>Use the flag --allow-file-access-from-files if working localy.
 		</div>
 		
 		<pre id="log"></pre>