Add a panel containing tasklist to bottom screen

This is implemented as a separate process, since creating and running
toplevel windows from inside Metacity has issues.

We now grab a DBus name, and exec the child process.  The child monitors
our name to know when to exit.

svn path=/trunk/; revision=153

src/shell-global.h

@@ -38,7 +38,9 @@ GdkPixbuf *shell_get_thumbnail_for_recent_info(GtkRecentInfo  *recent_info);
 
 ShellGlobal *shell_global_get (void);
 
-void shell_global_late_init (ShellGlobal *global);
+void shell_global_grab_dbus_service (ShellGlobal *global);
+
+void shell_global_start_task_panel (ShellGlobal *global);
 
 void shell_global_set_stage_input_area (ShellGlobal *global,
 					int          x,