make lcmgl optional in drakevisualizer.py
make lcmgl optional in drakevisualizer.py

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