Python Robot OS perception metapackage

 This package is part of Robot OS (ROS). It is a metapackage which
 provides all the ROS perception system (including ROS base).
 .
 Different to upstream, this package does not provide:
 image_pipeline, image_transport_plugins, laser_assembler, laser_filters,
 laser_geometry, perception_pcl.
 Please install them from source, if you need them.