virtual add
Merge branch 'adam_PID' of https://github.com/cedricpradalier/ros_kf_stack into adam_PID

Conflicts:
	sim_tasks/launch/launch_all_VREP.launch
Merge branch 'adam_PID' of https://github.com/cedricpradalier/ros_kf_stack into adam_PID
Merge branch 'adam_PID' of https://github.com/cedricpradalier/ros_kf_stack into adam_PID
Python alignment
Merge branch 'adam_PID' of https://github.com/cedricpradalier/ros_kf_stack into adam_PID
Tested and working FollowShore, even if the principle is not so sound.
Merge branch 'adam_PID' of https://github.com/cedricpradalier/ros_kf_stack into adam_PID