pytorch-0.3: Merge pull request #180 from RobotLocomotion/pf-add-cross-scene-check

Version of the code used for generating the results in the paper

@article{florencemanuelli2018dense,
  title={Dense Object Nets: Learning Dense Visual Object Descriptors By and For Robotic Manipulation},
  author={Florence, Peter and Manuelli, Lucas and Tedrake, Russ},
  journal={Conference on Robot Learning},
  year={2018}
}