Rough draft of the Committing guidelines

This is the rough draft and will have many more changes as we flesh out exactly what we want our committing standards to be.
Note: the Robottelo Standards link will be broken until we create that document.
Most of that is covered in the current section and the other part would logically be put into the code standards. I am sure the content for a PR reviewer document could be created, but much of the content would have to come from the other members of the team.