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)
@timthelion That's not an appropriate comment. You've been warned about making comments like these in the past. The Community Guidelines are clear on behavior and this will be your final warning on the issue.