extension: manual pythonanywhere deployment (to understand autoconfigure magic)

[hjwp]

this is based on the old manual version of the deploy chapter.

it's just a first cut, which is fine, but I intend to improve it, mainly by making it so that the end result of the manual deployment looks more like the deployment you get from the autoconfigure script. Specifically:

• [x] name project folder after the domain name
• [x] use virtualenvwrapper + workon, name virtualenv after the domain
• [x] use static files service and collectstatic

[hjwp]

ok have made those improvements, this is ready for review/testing I think!