ros: add xv11_driver package (currently in progress)
ros: edit xv11 driver to get it working and add LaserScan compatability

Thanks Forrest!
Merge branch 'master' into commproto to bring in xv11_driver

* master:
  ros: edit xv11 driver to get it working and add LaserScan compatability
  ros: add xv11_driver package (currently in progress)