_work_dir being set to None causes an error in os.path.exists
Fixing update_users to authenticate request
Source formatting

Clean up line endings and empty lines with tabs
Source formatting

Clean up email markdown formatting.
May not be a unicode string, so use isdigit instead of isnumeric
Fix for issue in github API where a pull request is successfully submitted, but it throws a 500 error
Fix open_URL so it works in more setups
Using github's special refs of refs/pull/{number}/HEAD to improve speed of fetching pr branch
Adding the ability to specify a 'footer' for the stats output
Adding the average number of changes per file to the status output
Adding ability to have a custom footer below your stats to display more useful data about a pull, as well as allowing you to format the appearance of the changes in the stats command
Sometimes, the pull/{number}/head reference doesn't work (not sure why, but randomly happens), so if we can't get the pull via that route, this change will check it out the old way