Add support for Xfconf to the panel and launcher plugins. Also
switch to GtkBuilder for the various dialogs. Furthermore some
fixes and cleanups.

 - Update TODO
 - Add provider_signal in the iface and use it in
   panel-plugin-external.c.
 - Direct call for provider_signal instead of
   g_signal_emit_by_name().

Because the devel branch is a rewrite that is not based
on master, so it needs to be merged on top of an empty
master.

	  - Completely rewritten launcher (Bugs 2336, 2365, 1323, 2262 and 1225)
	  - Various improvements in libxfce4panel (memory leaks, G_GNUC_INTERNAL,
	    GSList, canonical strings and fixed pedantic warnings).
	  - Libxfce4panel does no longer depend on libxfcegui4. This might cause
	    some problems with plugins. Plugin developers should add libxfcegui4
	    to the dependencies of their package (including cflags and libadd in
	    the makefiles).

(Old svn revision: 25077)

(Old svn revision: 17862)

* Fix bug that made panel always centered on startup

(Old svn revision: 13880)

* XfceItembar : container for XfceItem's
* XfceItem : simple container to add to an itembar
* XfceSeparatorItem : special XfceItem that simply shows a separator

* Make panel controls and separator item plugin use the new widgets.
* Make taskbar use new widgets


(Old svn revision: 4337)

* move taskbar and iconbox to panel
* panel config files in separate directory
* add panel library
* remove generated files. autogen.sh is now required to build from CVS.
* add time to taskbar
* use XfcePanelWindow widget for panel and taskbar (fixes bug #367 ;-)
* iconbox not functional yet (needs rewrite).


(Old svn revision: 4283)

(Old svn revision: 4107)

(Old svn revision: 4104)

Update plugin list (remove uninstalled and add newly installed ones) when opening the add item dialog. Based on the idea of Scott Barron <scott@elitists.net>.


(Old svn revision: 4016)

Sizing improvements: no autohide when not on screen edge (Eduard Rocatelli), always keep inside the screen, keep centered or to the edge when size changes, e.g when changing settings or adding/rmoving items. All xinerama aware.


(Old svn revision: 3866)

(Old svn revision: 3753)

(Old svn revision: 3729)

(Old svn revision: 3608)

(Old svn revision: 3585)

(Old svn revision: 3551)

(Old svn revision: 3516)

(Old svn revision: 3466)

(Old svn revision: 3457)

(Old svn revision: 3367)

(Old svn revision: 3342)

(Old svn revision: 3328)

(Old svn revision: 3320)