Added interactive pointcloud example to examples list.

examples/index.html

@@ -157,6 +157,7 @@
 				"webgl_interactive_cubes",
 				"webgl_interactive_cubes_gpu",
 				"webgl_interactive_draggablecubes",
+				"webgl_interactive_particles",
 				"webgl_interactive_voxelpainter",
 				"webgl_kinect",
 				"webgl_lensflares",