update valve segmentation algorithm
update valve segmentation algorithm

-flip valve normal axis to point into wall
-rename valve object
-change default colors

mithrandir123/director,manuelli/director,edowson/director,empireryan/director,patmarion/director,RobotLocomotion/director,patmarion/director,gizatt/director,patmarion/director,empireryan/director,rdeits/director,RobotLocomotion/director,openhumanoids/director,RobotLocomotion/director,RussTedrake/director,mitdrc/director,RussTedrake/director,rdeits/director,empireryan/director,mitdrc/director,edowson/director,empireryan/director,edowson/director,mitdrc/director,patmarion/director,manuelli/director,gizatt/director,openhumanoids/director,rdeits/director,mitdrc/director,empireryan/director,mithrandir123/director,mithrandir123/director,rdeits/director,RobotLocomotion/director,gizatt/director,RobotLocomotion/director,manuelli/director,openhumanoids/director,mitdrc/director,RussTedrake/director,openhumanoids/director,rdeits/director,edowson/director,mithrandir123/director,RussTedrake/director,manuelli/director,gizatt/director,gizatt/director,RussTedrake/director,edowson/director,openhumanoids/director,patmarion/director,mithrandir123/director,manuelli/director