hector_slam_launch: Update rviz config to have proper default displays
hector_trajectory_server: -Wait for tf become available to suppress warnings on startup
hector_trajectory_server: Print out tf availability warning only once.
Merge branch 'catkin' into update_mapping_demo_rviz_cfg
hector_trajectory_server: wait based on WallTime and check ros::ok() in waitForTf()
Merge branch 'add_tf_wait_trajectory_server' into catkin