Where we'll put docs for control-center

[Aaron Weber <aaron ximian com>]

Hey all. How does this sound?

We'll add docs directories to gnome-control-center and
control-center-plus. Zaphod and Hovinen will handle the makefile magic.

The directories will be:
gnome-control-center/doc/C/
control-center-plus/doc/C/

The shell will be documented in gnome-control-center.sgml, a complete
article.

Each capplet gets its own, complete sgml file: keyboard-capplet.sgml
with its own DTD, not included in any other file. etc.  We'll want to
avoid using "index" as an article id, however, in the capplet docs.

Then we can install them all to $prefix/help/gnome-control-center/
and link from the Control Center's help-->Control Center Help menu to 

$prefix/help/gnome-control-center/index.html,

and from the capplets to
$prefix/help/gnome-control-center/capplet-name.html

Let me know if that's completely broken or wahtever. Otherwise, I'll
start to do it in a few hours.

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