The advantage of this approach is that the production and dev configurations are
in version control, so there's less opportunity for surprises.
As advocated by Jacob Kaplan-Moss (OSCON 2011) and Two Scoops of Django book.
The directory nesting is unnecessary here and confusing to navigate. I've moved
all apps to the project subdirectory, currently called "www", but soon to be
renamed "conservancy".
I've also moved manage.py to the top-level directory.
