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.
My plan is to have an initial draft of the code_standards.rst (code-standards.rst) submitted today. The broken link won't remain broken for more than 6-8 hours hopefully!