[1.1.X] Fixed #9819 - Added exemplary documentation for comments app. Thanks...

[1.1.X] Fixed #9819 - Added exemplary documentation for comments app. Thanks for the initial patch, Thejaswi Puthraya.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@12245 bcc190cf-cafb-0310-a4f2-bffc1f526a37