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.
not sure how to handle that. Would you rather I just put up a code_standards.rst file with a single todo note? I am going to flesh that out for the issue I opened today #1496