[testing] Cleanup import in test
[testing] Convert video_camera_diffimg_testing to new pymorse
[test] update camera test abs(sum) -> sum(abs)
[human] Add LEFTALTKEY for show_objects of human
[doc] More details on ROS installation
[builder] Add support for MORSE_RESOURCE_PATH (#187)
[doc] describe the details supervision service
[testing] Improve tests on waypoint services

Test the interaction between goto, stop, resume and get_dest.
Fix #202