Initial Python 3 compatible code

src/notifier/__init__.py

@@ -2,6 +2,7 @@
 """ A cross platform notification system.
 Under Linux, the wx.NotificationMessage does not show a notification on the taskbar, so we decided to use dbus for showing notifications for linux and wx for Windows."""
 from __future__ import absolute_import
+from __future__ import unicode_literals
 import platform
 
 notify = None

src/notifier/linux.py

@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+from builtins import object
 import dbus
 import application
 

src/notifier/windows.py

@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+from builtins import object
 import wx
 
 class notification(object):