OpenNI: initial import to moonbase

I can't say I have a running kinect over here,
but at least all software depending on OpenNI compiles fine with this...
rospkg: initial commit for rospkg
catkin_pkg: initial import to moonbase
rosdistro: initial import
rosinstall: initial import
wstool: initial import
rosinstall_generator: initial import
rosdep: initial import

This is pretty much crap for non-ubuntu OSes,
but we still need it around...
ompl: initial import to moonbase
sdformat: needed by gazebo
gazebo: added to moonbase

This is a full-fledged 3D Physics simulator
ros: add profile package