Python client library

[ekzhang]

Hi there! Thanks so much for making Maelstrom. I just ran a small workshop at a systems reading group that I organize at Harvard, and we all worked on the Gossip Glomers challenges together on a shared remote computer. It was a lot of fun :)

I wrote a Python client library for Maelstrom (via asyncio) for the purposes of the workshop, since I did a quick poll, and most of the members of our reading group didn't know Go or JavaScript but were still interested in learning about distributed systems. I thought it might be helpful for others who are more familiar with Python as well. Would you be open to a pull request where I add this library to the demo/ folder for others to use?

https://gist.github.com/ekzhang/65310f0260c03d4ec340e0daf0ccb9d5#file-_maelstrom-py

[aphyr]

Sure, go for it!