Add page(s) with content on the project background and science.

[jamessynge]

I'm working on converting the "PANOPTES System Description" Google Doc to markdown, and would like to reference pages with the history of the project and the science aspects. Ideally we could make use of Olivier's pages at https://www.naoj.org/staff/guyon/09allskysurvey.web/content.html, preferably by updating/copying them into this site.