restructure and rename code

CMakeLists.txt

include/ccf/connection/Connection.h

include/ccf/connection/MqttConnection.h

include/ccf/connection/NngConnection.h

include/ccf/controller/Controller.h

include/ccf/controller/DummyRobotArmController.h

include/ccf/controller/MoveItRobotArmController.h

include/ccf/controller/RobotArmController.h

include/ccf/util/NodeUtil.h

include/ccf/util/scene_collision_object.h

include/ccf/util/scene_constructor_util.h

src/ccf/connection/MqttConnection.cpp

src/ccf/connection/NngConnection.cpp

src/ccf/controller/Controller.cpp

src/ccf/controller/DummyRobotArmController.cpp

src/ccf/controller/MoveItRobotArmController.cpp

src/ccf/controller/RobotArmController.cpp

src/ccf/util/scene_collision_object.cpp

src/ccf/util/scene_constructor_util.cpp

src/ccf/util/scene_controller_node.cpp