use naoqi timestamps

[Karsten1987]

For now, the bridge is timestamped via ros::now() directly after the naoqi proxy call is executed.
Since not all sensor data are timestamped on naoqi side, this is for the time of writing the only way of synchronizing all data.

By using a timestamp of naoqi (DCM) we can synchronize the data with a naoqi timestamp.

[lgeo3]

You said that some sensor data are not timestamped, can we build a list/report bug to naoqi ?

The sensor that are well timestamped:

• laser
• camera (2d)
• camera (depth)