libxfcegui4 progress

[Olivier Fourdan]

Hi all,

I keep working on libxfcegui4.

- I've fixed and improved session management, no more hangs at logout.

- I've added a fileselector with a preview pane (usefull for icons and
image selection in xfce panel, backdrop manager, etc)

- I've also added a bunch of hooks to netk lib internals to manage
plenty of WM spec (see netk-util.h)

- I've added margins (aka "strut") query/set as per Jasper request along
with an example on how to use them (pretty funny to play with margins)

Enjoy,
-- 
Olivier               <fourdan at xfce.org>            http://www.xfce.org
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XFce is a lightweight  desktop  environment  for  various *NIX systems. 
Designed for productivity,  it loads  and  executes  applications fast,
while conserving  system resources. XFce is all free software, released
under GNU General Public License.    Available from http://www.xfce.org