Adds second segmentation method via blurring

	modified:   pandora_vision_hole_detector/cfg/rgb_cfg.cfg
	modified:   pandora_vision_hole_detector/include/rgb_node/hole_detector.h
	modified:   pandora_vision_hole_detector/include/utils/parameters.h
	modified:   pandora_vision_hole_detector/src/rgb_node/hole_detector.cpp
	modified:   pandora_vision_hole_detector/src/rgb_node/rgb.cpp
	modified:   pandora_vision_hole_detector/src/utils/parameters.cpp