Documentation of Expected Sensor Rates for PR2 (ros ticket #4382)

[ahendrix]

A single place on the wiki that lists the frequency at which various sensors and systems on the PR2 should update would assist in debugging unexpected behavior of the robot.

trac data:

• Owner: wim
• Reporter: thermans
• Reported at: Mon May 31 15:42:26 2010
• URL: https://code.ros.org/trac/wg-ros-pkg/ticket/4382

[ahendrix]

[leibs] I think this ticket most fits under pr2-robot.