[development] AB-Use revisions to replace previews

[Earnie Boyd]

Quoting Chris Johnson <cxjohnson at gmail.com>:

> It occurs to me that maybe [preview]  [save]  and [publish] are the
> actions / verbs which might make sense.  If a site is configured with
> a workflow where authors cannot publish directly, but need an editor
> approval first, then of course the [publish] button is not displayed.
>

But in the later scenario I might not be ready for the editor to 
publish it.  I would always want a [preview] without saving to the DB.  
I would want [draft] to save a working copy for later revision by me 
and only me.  And I would then want a [ready] for an editor to publish. 
  If I was editor then I would get the [publish] button instead of the 
[ready] button.

Earnie