examples and docs.

Summary: This diff updates the documentation and tutorials with information about the new pulsar backend. For more information about the pulsar backend, see the release notes and the paper (https://arxiv.org/abs/2004.07484). For information on how to use the backend, see the point cloud rendering notebook and the examples in the folder docs/examples.

Reviewed By: nikhilaravi

Differential Revision: D24498129

fbshipit-source-id: e312b0169a72b13590df6e4db36bfe6190d742f9

README.md

@@ -106,11 +106,23 @@ If you find PyTorch3D useful in your research, please cite our tech report:
 }
 ```
 
+If you are using the pulsar backend for sphere-rendering (the `PulsarPointRenderer` or `pytorch3d.renderer.points.pulsar.Renderer`), please cite the tech report:
+
+```bibtex
+@article{lassner2020pulsar,
+    author = {Christoph Lassner},
+    title = {Fast Differentiable Raycasting for Neural Rendering using Sphere-based Representations},
+    journal = {arXiv:2004.07484},
+    year = {2020},
+}
+```
 
 ## News
 
 Please see below for a timeline of the codebase updates in reverse chronological order. We are sharing updates on the releases as well as research projects which are built with PyTorch3D. The changelogs for the releases are available under [`Releases`](https://github.com/facebookresearch/pytorch3d/releases),  and the builds can be installed using `conda` as per the instructions in [INSTALL.md](INSTALL.md).
 
+**[November 2nd 2020]:** PyTorch3D v0.3 released, integrating the pulsar backend.
+
 **[Aug 28th 2020]:**   PyTorch3D v0.2.5 released
 
 **[July 17th 2020]:**   PyTorch3D tech report published on ArXiv: https://arxiv.org/abs/2007.08501