[1.1.X] Fixed #9465 -- Simplified API Reference documentation titles for...

[1.1.X] Fixed #9465 -- Simplified API Reference documentation titles for easier lookup and made first-level heading styles consistent.  Thanks, adamnelson.

Backport of r11990 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@11991 bcc190cf-cafb-0310-a4f2-bffc1f526a37