Ahodges/doc/doc 792

Initial, proof of concept draft, focusing initially on enrollment chapters. @shnayder , @clintonb , @dsjen , @mulby , @brianhw , @rocha , @JAAkana , @WatsonEmily , @stroilova please feel free to comment anytime on this PR from now through release.

An HTML draft is now available! http://draft-edx-insights.readthedocs.org/en/latest/

@mulby I didn't buy the ISO organization's publication, but I have a certain level of confidence that A1 - Anonymous Proxy, A2 = Satellite Provider, and O1 = Other Country (from this site http://dev.maxmind.com/geoip/legacy/codes/iso3166/ and a few others)
ZZ = Unknown region (in the EU): http://cldr.unicode.org/translation/country-names
I'll put the first three in as examples, with the names, and drop ZZ.