Updated from local

backpack_pkg/CMakeLists.txt

backpack_pkg/launch/assembler.py

backpack_pkg/launch/backpack_navigation.launch

backpack_pkg/launch/backpack_sensors.launch

backpack_pkg/launch/display.rviz

backpack_pkg/launch/gps_velo_pub.launch

backpack_pkg/launch/in_develpment/gps4navsat.py

backpack_pkg/launch/in_develpment/odom_to_path.py

backpack_pkg/launch/in_develpment/post_gps_2.py

backpack_pkg/launch/laser_assemble.launch

backpack_pkg/launch/odom_to_path.py

backpack_pkg/launch/post_gps_2.py

backpack_pkg/launch/test_tf.txt

backpack_pkg/launch/velo_slam.launch

backpack_pkg/params/ekf_navsat.yaml