some recipes and acknowledgement

pcl: initial commit (resolves #135)

Based on initial work by bulwahn: https://github.com/bulwahn/meta-ros/tree/pcl-v4
Extensively discussed at #135

recipes for collada-urdf

After configuring collada-urdf, the recipe modifies the generated
files to address the problem in #175. However, it does not solve
the root of this cause.

libfreenect: force libraries always into /usr/lib (resolves #187,#188)

libfreenect: generalizing lib reference (resolves #185)

freeglut, libfreenect and freenect-camera

Recipes for orocos-kdl, kdl-conversions, tf-conversions, kdl-parser and robot-state-publisher - reviewed in #181

packagegroup-ros-world: removed urdfdom-headers and added build image