Updated ros-pkg for RTAB-Map 0.8.0
Moved all nodelets and rviz plugins in "rtabmap_ros" namespace instead of "rtabmap"
Refactored rtabmap_ros messages (added convenient conversion methods in rtabmap_ros/MsgConversion.h)
Added noise filtering parameters for map_assembler node
Added variance parameter for map_optimizer node
Odometry nodes publish covariance matrices in odometry messages. Publish rtambap_ros::OdomInfo topic too.
Merge branch 'master' of https://github.com/introlab/rtabmap_ros