* update license to BSD and maintainer to ros-orphaned-packages@googlegroups.com
since original gmapping source and ROS openslam_gmapping package has been updated to the BSD-3 license, I think we have no reason to use CC for slam_gmapping package
* update license to BSD and maintainer to ros-orphaned-packages@googlegroups.com
since original gmapping source and ROS openslam_gmapping package has been updated to the BSD-3 license, I think we have no reason to use CC for slam_gmapping package