new class to check connectivity; VitalChecker
Merge remote-tracking branch 'refs/remotes/origin/master' into class-to-check-conneciton-of-nodelet

Conflicts:
	jsk_pcl_ros/include/jsk_pcl_ros/organized_multi_plane_segmentation.h
	jsk_pcl_ros/src/organized_multi_plane_segmentation_nodelet.cpp
add include of pcl_util.h to OrganizedMultiPlaneSegmentation
Merge pull request #214 from garaemon/class-to-check-conneciton-of-nodelet

Class to check conneciton of nodelet and add it into OrganizedMultiPlaneSegmentation