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)
@fredlf Oh, come on, that's a double negative ;).  But I jest.  I don't want any hard feelings or arguments over such a triviality.