inserted test_node, worked on quad_tree
removed annoying warnings with casts
I forgot to save...
restructured
intermediate result
Merge branch 'hydro_dev' of https://github.com/ptrb/ipa_loc_feature_slam into quad_tree

Conflicts:
	src/ipa_loc_feature_slam_ros.cpp
	src/slam_data_uz.cpp
	src/slam_landmark.cpp
	src/slam_landmark.h
	src/slam_observation.cpp
	src/slam_particle.cpp
	src/slam_particle.h
	src/slam_processor.cpp