Fixed #10336 -- Added improved documentation of generic views. Thanks to Jacob...

Fixed #10336 -- Added improved documentation of generic views. Thanks to Jacob and Adrian for the original text (from the DjangoBook), and Ramiro for doing the work of porting the docs.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@11025 bcc190cf-cafb-0310-a4f2-bffc1f526a37