------------------------

Feature: Add ``:show-docstring:`` flag to ``autoconfig`` directive.

Feature: Add ``:hide-classname:`` flag to ``autoconfig`` directive.

Feature: Rewrite ``ConfigIniEnv`` to use configobj which allows for nested
sections in INI files. This also allows you to specify multiple INI files
and have later ones override earlier ones.

Bug: Fix ``autoconfig`` Sphinx directive and add tests--it was all kinds of
broken.