Removed some now dead code from deletion (thanks to Carl Meyer for noticing it).
Fixed #18026 -- Don't return an anonymous dict if extra_data in storage is empty.
Fixed #19024 -- Corrected form wizard docs for get_form_prefix.
Return namedtuple from get_table_description

We don't make use of it currently to not break third-party db
backends.
Fixed #17574 -- Implemented missing get_key_columns in PostgreSQL backend
Fixed #14633 - Organized settings reference docs and added a topical index.

Thanks Gabriel Hurley for the original idea
and adamv for the draft patch.
Fixed typo in file storage docs.

Thanks Jørgen Abrahamsen.
Added details on minified jQuery and DEBUG mode for contrib.admin.

Thanks Daniele Procida.
Send post_delete signals immediately

In a normal relational construct, if you're listening for an event
that signals a child was deleted, you dont expect that the parent
was deleted already.

This change ensures that post_delete signals are fired immediately
after objects are deleted in the graph.
Add David Cramer to AUTHORS
Move signal disconnect into finally block
Move logic seperation as its not longer repetitive
Improve test to ensure that post_delete was actually called