added depth map 2 pointcloud conversion class to trunk for 3d navigation

git-svn-id: https://roboticssrv.wtb.tue.nl/svn/ros/code/tue-ros-pkg/trunk/tue_utils/depth_map_to_point_cloud@16376 3a3c2cfb-d3b9-409e-9e75-db8fcdbcaac6
Merge branch 'master' of https://github.com/tue-robotics-lab/depth_map_to_point_cloud