Editor's pages consolidated (Bug #20160)

Hi, everyone:

We've consolidated the editor's pages and created a quick-ref overview here:

http://docs.webplatform.org/wiki/WPD:Editors_Guide

I've closed https://www.w3.org/Bugs/Public/show_bug.cgi?id=20160, but
consider this a work-in-progress, so any feedback appreciated.

Julee
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julee@adobe.com
@adobejulee