Some modifications to the lvsnbot_description and kinect bringup

- Corrects the custom_navigation/CMakeLists.txt for the include dir bug.
- Adds a urdf specific for the configuration of the lvsnbot
- Changes the kinect_filtered launch file to be placed in a node
  - Now requires the hydro-devel branch of https://github.com/ros-drivers/openni_launch.git and https://github.com/ros-drivers/rgbd_launch.git