Xfce timer plugin

   Hi all,

   Here's my version 0.1 of a timer plugin for XFCE4. It's similar to 
KTeaTime for those of you who are faimilar with KDE. You can define a 
number of alarms. You can either specify a countdown period or a time of 
the day for the alarm. You select the one you want from a popup menu and 
start the coundown. When the countdown ends, a Gtk warning window is 
displayed, or, a command specified by the user is run.

   Clearly, this first version is waiting for testers and suggestions. Some 
of the ideas in my mind are in the TODO file. The only serious issue right 
now is the progressbar: This is the main widget in the plugin display; it 
"fills" as the countdown approaches to its end. I'm trying to get a thin 
progressbar but the panel insists on producing a big, fat one. One other 
issue is that you get some warnings when you remove the plugin right after 
you add it to the panel. It doesn't crash though. It appears to be related 
to the freeing of a gtk_list_store object (pd->list in the code).

   Finally: I'm supposing that this is a plugin which would be added to the 
panel only when needed; but one also would like to keep the settings. The 
XML system provided in the plugin read/write_config functions loses the 
settings when the plugin is removed from the panel. For this reason I'm 
currently writing the settings to the file

  ~/.config/xfce4/panel/timer_settings

   It's a file with the format of a GKeyFile. This may not be a very good 
solution; and I'm waiting for hints on how to properly achieve the 
purpose.

   Test and enjoy!

   Ilgar