Jul 2014 docs adjustments

Lots of fun stuff! This probably needs review before merging, to make sure I didn't slip up somewhere. 

We should also discuss where to merge it. Once we know whether the changes are good, let me know whether I should rebase onto stable or something. Ideally, I'd like to get these into 2.0, 2.1, and next. 
The reason for this is for GUI's and other clients to understand and display the maximum renderable pages. Perhaps a quick mention of that would help with the explanation behind this option.