A helper function to create org-mode TODOs out of open issues in a github repository.
Before use you need to set the variable org-github-issues-org-file to point to an existing
file in which to write the fetched issues.
In the specified file, create a header for your github project, .e.g iensu/org-github-issues.
The header must match the repository name (OWNER/REPO) exactly.
After setup you can run M-x org-github-issues-sync-issues, which will prompt you for the repository
you want to fetch issues for.