Remove libappindicator support.

Index: src/gromit-mpx.c
--- src/gromit-mpx.c.orig
+++ src/gromit-mpx.c
@@ -951,17 +951,6 @@ void setup_main_app (GromitData *data, int argc, char 
   if (activate)
     acquire_grab (data, NULL); /* grab all */
 
-  /* 
-     TRAY ICON
-  */
-  data->trayicon = app_indicator_new (PACKAGE_NAME,
-				      "net.christianbeier.Gromit-MPX",
-				      APP_INDICATOR_CATEGORY_APPLICATION_STATUS);
-
-  app_indicator_set_status (data->trayicon, APP_INDICATOR_STATUS_ACTIVE);
-
-
-
   /* create the menu */
   GtkWidget *menu = gtk_menu_new ();
 
@@ -1087,9 +1076,6 @@ void setup_main_app (GromitData *data, int argc, char 
   gtk_widget_show (about_item);
   gtk_widget_show (quit_item);
 
-
-  app_indicator_set_menu (data->trayicon, GTK_MENU(menu));
-
   /*
     Build the support menu
    */
@@ -1417,8 +1403,4 @@ int main (int argc, char **argv)
 
 void indicate_active(GromitData *data, gboolean YESNO)
 {
-    if(YESNO)
-	app_indicator_set_icon(data->trayicon, "net.christianbeier.Gromit-MPX.active");
-    else
-	app_indicator_set_icon(data->trayicon, "net.christianbeier.Gromit-MPX");
 }