add new filtering routines to filterUtils.py
add new filtering routines to filterUtils.py

openhumanoids/director,mitdrc/director,RobotLocomotion/director,manuelli/director,RobotLocomotion/director,patmarion/director,openhumanoids/director,mitdrc/director,RobotLocomotion/director,manuelli/director,manuelli/director,patmarion/director,openhumanoids/director,mitdrc/director,mitdrc/director,patmarion/director,patmarion/director,openhumanoids/director,RobotLocomotion/director,manuelli/director,mitdrc/director,RobotLocomotion/director,manuelli/director,patmarion/director,openhumanoids/director