[1.0.X] Refs #9935: Added a note in the documentation to the effect that...

[1.0.X] Refs #9935: Added a note in the documentation to the effect that Django currently requires a 4.X release of cx_Oracle. Backport of [9709] from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@9710 bcc190cf-cafb-0310-a4f2-bffc1f526a37