Merge pull request #193 from bulwahn/master

some recipes and acknowledgement
pcl-conversions: initial commit
pcl-ros: initial commit
depth-image-proc: initial commit
rgbd-launch: initial commit
freenect-launch: initial commit
freenect-camera: moved S variable to freenect-stack.inc
Merge pull request #192 from KristofRobot/freenect-launch3

pcl-conversions, pcl-ros, depth-image-proc, rgbd-launch and freenect-launch
navigation: initial commit

This commit includes all navigation packages except robot_pose_ekf.
The robot_pose_ekf requires bfl, which we could not provide yet.
vision-opencv: updating to 1.10.11
laser-geometry: updating to 1.5.14

The patch to check for CATKIN_ENABLE_TESTING has been included in
version 1.5.14.
packagegroup-ros-world: adding new recipes