* Removed flatpages/redirects README; no other contrib apps have those.
  * Cleaned up top-level README to be more readable.
  * Removed outdated references to old docs (Fixes #8701)

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8857 bcc190cf-cafb-0310-a4f2-bffc1f526a37