The panel is the only applciations launching the wrapper,
so use fixed locations for data in the argv.

This will reduce the amount of dbus messages during
startup. Also easy to work with transactions in the
future, but that is not needed right now.

This is simple script using the remote-event signal
for panel plugins.

This allows to send messages to plugins using the (hidden)
xfce4-panel command line option
--plugin-event=plugin-name:name:type:value. This can for
example be used to popup a plugin menu from a script.

Plugins running in a wrapper don't support the boolean return
value yet.

We now set a unique path for each wrapper that will
show up under org.xfce.Panel. This makes it easier to
understand in the wrapper (no message filtering) and moves
all the external communication in the panel-plugin-external.c
code.

Not code that is suitable for plugin developers. Also
drop the I_() macro and use g_intern_static_string directly.

Remove unneeded INCLUDES from makefiles.

Move the libexec executables to $(libexecdir)/xfce4/panel/.

Bump the library ABI version to -2, people need to make changes
to the build files for their plugins, so better do it the
right way from the beginning.

Move plugin libraries to $(libdir)/xfce4/panel and desktop
files to $(datadir)/xfce4/panel. Much more consistent.

Still occurs the panel keeps restart when you quit
with errors in the code.

New launchers can not be loaded from the application
pool, this makes the default panel setup easy to work
with. Also split and share more related code so it
is easy to understand.

If the other parts segfault during a normal quit, the
XFCE_SM_CLIENT_RESTART_NORMAL is never set, which results
in a panel that can not quit.

Also change the frame shadow to etched in since this is
a bit more subtile.

When there are no panels found the migration application is
spawned (sync).

Add a parser to import an xml channel file into a
channel and add a default configuration.

The migration utility will now prompt with a
question dialog whether to import the olf 4.6
config or use the default setup.