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)
It became clear after Tims comment, for some reason LGTM never became 'el-gee-tee-em' in *my* head, which explains my confusion.

A style guide might be useful for stuff like this (but don't hit me if I mess things up :smile:)

Apologies for messing up the discussion