Fixed #9477 -- Removed and edited a bunch of references to "development

version". Some were replaced with versionadded or versionchanged directives.
Other, more minor ones, were removed altogether.

Based on a patch from James Bennett.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@9454 bcc190cf-cafb-0310-a4f2-bffc1f526a37