Add readme, modify setup_grammar.py to show proper usage.

[surister]

Summary of the changes / Why this is an improvement

Checklist

• [ ] Link to issue this PR refers to (if applicable):
• [ ] CLA is signed

[surister]

Thanks. Using active voice would be cool for docs and prose on future occasions. Here, this can also happen on a subsequent iteration.

Thanks, I re-pushed a new version, hopefully it's better now.

[amotl]

Excellent. 💯

assert wordcount("we") == 0

Thank you so much.