[Doc] Banners on README.md (#572)

README.md

@@ -1,5 +1,10 @@
 [![pytorch](https://circleci.com/gh/pytorch/rl.svg?style=shield)](https://circleci.com/gh/pytorch/rl)
 [![codecov](https://codecov.io/gh/pytorch/rl/branch/main/graph/badge.svg?token=HcpK1ILV6r)](https://codecov.io/gh/pytorch/rl)
+[![Twitter Follow](https://img.shields.io/twitter/follow/torchrl1?style=social)](https://twitter.com/torchrl1)
+[![Python 3.7, 3.8](https://img.shields.io/badge/python-3.7%20%7C%203.8%20%7C%203.9%20%7C%203.10%20%7C%20-blue.svg)](https://www.python.org/downloads/release/)
+[![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/pytorch/rl/blob/main/LICENSE)
+<a href="https://pypi.org/project/torchrl"><img src="https://img.shields.io/pypi/v/torchrl" alt="pypi version"></a>
+<a href="https://pypi.org/project/torchrl-nightly"><img src="https://img.shields.io/pypi/v/torchrl-nightly?label=nightly" alt="pypi nightly version"></a>
 
 # TorchRL