Add process for PR acceptance, review, rejection

This is an extremely tentative PR.  However, I feel that the suggestions are generally good.

Docker-DCO-1.1-Signed-off-by: Timothy Hobbs <timothyhobbs@seznam.cz> (github: timthelion)
Exactly. In this sentence the subject (you) is expressing a conditional (they are "not sure") so the object (the PR) should take the conditional "if". It's a nit, so leave it if you want, but that's how I'm parsing that sentence.