Include paper, website information (#177)

* [Minor] Update README.md.

* [Minor] Fix precommit errors.

* [Minor] Update precommit config

Co-authored-by: Xiuyu Li <xl289@cornell.edu>

Author: kentang-mit

.pre-commit-config.yaml

@@ -32,7 +32,7 @@ repos:
       - id: mdformat
         name: (Markdown) Format with mdformat
   - repo: https://github.com/asottile/pyupgrade
-    rev: v2.19.4
+    rev: v3.0.0
     hooks:
       - id: pyupgrade
         name: (Python) Update syntax for newer versions

README.md

@@ -2,6 +2,8 @@
 
 TorchSparse is a high-performance neural network library for point cloud processing.
 
+### [website](http://torchsparse.mit.edu/) | [paper](https://arxiv.org/abs/2204.10319) | [presentation](https://www.youtube.com/watch?v=IIh4EwmcLUs)
+
 ## Installation
 
 TorchSparse depends on the [Google Sparse Hash](https://github.com/sparsehash/sparsehash) library.