Renamed strands_ground_plane to ground_plane_estimation
Renamed strands_people_tracker to bayes_people_tracker
Renamed strands_upper_body_detector to upper_body_detector
strands_perception_people_launch is now perception_people_launch
strands_visual_odometry is now visual_odometry
Splitting utils package into seperate packages.
Calling the leg_detector directly to not need a private fork anymore.
Renamed pedestrian_tracker launch files
Merge pull request #96 from cdondrup/rename

Renaming most of the packages to comply with ROS naming conventions