Clojurians Log v2

I just saw the "Edit on GitHub" button on doc pages created from markdown. I don't think it is a good idea to show this button unconditionally. For example, I generate much of the documentation for QClojure and for Overarch from different sources, so editing them in GitHub would be not a good idea, because the changes would be overridden on the next release. Also editing change logs would be counterproductive, IMHO. Maybe a flag in the config to toggle the button is appropriate.