support nodelet throttle of jsk_pcl_ros.

It requires https://github.com/jsk-ros-pkg/jsk_recognition/pull/25 to be merged.

* add use_nodelet_throttle argument to kinect_head.launch to toggle
  nodelet throttle and topic_tools throttle
* add nodelet_manager argument to kinect_head.launch to specify
  the name of the nodelet manager.