Improve README with example and some minor things #2
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It took me a minute to figure out whether this project indeed does what I was looking for, whether it requires external libraries, and how to use it. An example might be helpful to add to the readme file. While I was at it, I also added a remark that it only uses standard libraries, fixed a few typos, and improved the Markdown formatting (to make the indented code lines show up as code).
Thanks for the helpful project!