Simple python script to count commits in a git repo given a specific list of author email addresses.

1. clone the repo.
2. You might need to mark the script as executable, better double check to be sure.
3. cd into your favorite local git repo and then issue <path to cloned repo>/commit_counts.py --since 06/06/2001 --until 12/31/2015 foo@bar.com bar@foo.com.
4. replace the dates and email address with relevant information.