Adds /rpms topic to neato_laser_publisher
Added code to publish motor RPMS via an "/rpms" topic.
The RPM data is a single std_msgs::UInt16 value
This is exercised in the xv11_motor_listener.py script here:
https://github.com/jetdillo/glyptodon
Got rid of extraneous NodeHandles now that I know more about how they work.
Thanks to @trainman419 for the elucidation.
Merge pull request #1 from jetdillo/master

Added a new publisher to publish motor RPMs as a topic. Useful for those of us with just a Neato LDS and no logic board or Neato Robot