Added rviz argumant for demo launch files to enable/diable running the rviz
Added odom as world frame to ekf_localization node.
set imu differential param to false.
reduce yaw goal tolerance from 0.314 to 0.157
tweak costmap and planner parameters for real robot.
added joystick argumant.
removed unnecessary alwaysOn parameter from imu plugin and added robotNamespace parameter.
removed running rviz from jackal_navigation launch files.
Added gps_transform.launch for transforming GPS data to robot's world frame. Also added gps_integration_demo.launch for fusing GPS data with odomtery data. This node generates map->odom transform.
parameter tweaked for odom navigation: navigation is working very good.
Changed config/ to params/. Moved non-demo launch files to launch/include.
Moved rviz configurations to jackal_viz.
Fixed location of non-demo launch files in roslaunch-file-check in CMakeList