GitHub Issues Workflow for Chef

This RFC codifies the workflow of Chef maintainers while maintaining issues and contributions for Chef.

Special thanks to @btm / @lamont-granquist / @danielsdeleo / @mcquin / @adamedx / @jdmundrawala  who has helped put the first version come together.
Great idea @stevendanna. I wonder if there is an easy way since the actual commit message after the merge from a PR is automatically created via Github. Anyone knows if the commit message while merging via GUI is configurable?