This just documents the cli interface syntax. Mostly a lift from
http://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/CLI
with some minor editing and bringing up to date.
Also document a few undocumented commands.
Shuffle around the order in 'pacmd help' output to match the order
in the new docs for consistency.
https://bugs.freedesktop.org/show_bug.cgi?id=45029