WIP: Update formatting for PeerJ

I think for submission we should be using [this template](https://www.writelatex.com/templates/latex-template-for-peerj-journal-and-pre-print-submissions/ptdwfrqxqzbn#.Uzgijq2Sw5k), but I'm not sure yet how to include these external classes (wlpeerj.cls) with our build system. I'll investigate in the morning (it's currently 1am Australian time! =), along with some final copy edits in the remaining sections, and submit. Please provide feedback and/or copy-edits as you are able!