Including a unique uuid in the tracker message keeping the old id as well.
Using trackers uuid and added some comments
Removed some of the values and added the complete pedestrian localisation message which contains the removed ones.
Still some overhead in information to ease usage like the uuid, id ppl pose and robot pose.
Also added the base_link transform because the transform to base_link is always performed to get the relative distance and angle to the robot.
The output of pedestrian localisation is not an array.
Merge pull request #23 from cdondrup/hydro-devel

Unique uuids for every module of the ppl perception pipeline that uses ids. 

Solves https://github.com/strands-project/strands_perception_people/issues/72