Normalized the default application template.

Removed the default test that 1 + 1 = 2, because it's been committed
way too many times, in too many projects.

Added an import of `render` for views, because the first view will
often be:

def home(request):
    return render(request, "mysite/home.html")
Moved code comments about WSGI to docs, and rewrote said docs.
Used a significant example for URLconf includes.
Added links to the settings documentation.
Removed admindocs from default project template.
Enabled the admin by default.

Everyone uses the admin.
Disabled the sites framework by default.

RequestSite does the job for single-domain websites.
Removed settings related to email reporting.

While handy for small scale projects, it isn't exactly a best practice.