Timestamp when using ROS package

[flandrewries]

Hello, I'm wondering about the timestamp problem in the ros package.
When A PointCloud2 Msg is published out,
it's timestamp in the header is the localhost time retrieving from time in cpu-clock,
the Lidar Sampling time which depends on the Lidar inner-clock,
nor the ros::Time::now() when it publishing?
Thanks very much

[mjseppa]

See: #26