Now deletes the destination folder before creating the disc

Allows to shutdown the computer at end

src/devede/shutdown.py

@@ -0,0 +1,52 @@
+# Copyright 2014 (C) Raster Software Vigo (Sergio Costas)
+#
+# This file is part of DeVeDe-NG
+#
+# DeVeDe-NG is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# DeVeDe-NG is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>
+
+import dbus
+
+class shutdown:
+    
+    def __init__(self):
+
+        # First, try with logind
+        try:
+            bus = dbus.SystemBus()
+            bus_object = bus.get_object("org.freedesktop.login1", "/org/freedesktop/login1")
+            bus_object.PowerOff(False, dbus_interface="org.freedesktop.login1.Manager")
+        except:
+            failure=True
+
+        if (failure):
+            failure=False
+            
+            # If it fails, try with ConsoleKit
+            try:
+                bus = dbus.SystemBus()
+                bus_object = bus.get_object("org.freedesktop.ConsoleKit", "/org/freedesktop/ConsoleKit/Manager")
+                bus_object.Stop(dbus_interface="org.freedesktop.ConsoleKit.Manager")
+            except:
+                failure=True
+
+        if (failure):
+            failure=False
+
+            # If it fails, try with HAL
+            try:
+                bus = dbus.SystemBus()
+                bus_object = bus.get_object("org.freedesktop.Hal", "/org/freedesktop/Hal/devices/computer")
+                bus_object.Shutdown(dbus_interface="org.freedesktop.Hal.Device.SystemPowerManagement")
+            except:
+                failure=True