master
add a tray, similar to those ones: https://research.googleblog.com/2016/03/deep-learning-for-robots-learning-from.html
Add kuka grasping block playback.
add optimized tray/traybox.urdf
add nicer meshes to kuka_with_gripper.sdf and add kuka_with_gripper2.sdf that can rotate without messing up IK fix tray/tray_textured4.obj and tray/tray.urdf fix kuka_with_cube.py allow both IK /end-effector control and joint-space control in kuka environment, use 1./240. sec. step and 150 solver iter bump up pybullet to 1.1.7
