Fix for Ubuntu and add chores system

* Made it run on Ubuntu Oneiric
* Created chores system
* Implemented admin button for adding "extra time for today"
* Enhanced the session/desktop blocking routines
* Enhanced some data entry dialogs
* Did some Debian packaging fixes
* Added Estonian translation
Fix timeout button label (on second run)
Simplify dbus daemon configuration to make it work with non-admin users.
Fix the hack for delaying until Unity is started (was broken in Unity 2D)
* Make chores check immune to changes of chores list in runtime.
* A bit more sane chore availability check.
Make session block on logon work with Ubuntu 2D, GNOME, GNOME Classic, LXDE, Lubuntu
Implement systray as a notify service, fix some information services.
Update translations.
Fix datetime caculation bug in notification service.
Fix force logout problem
Merge branch 'master' of github.com:boamaod/nanny

Conflicts:
	po/gl.po
Add fallback for closing LXDE session.
Fix duplification of gl.po content.
Remove debian directory
Updated POTFILES.in
Remove po/nanny.pot and add it to .gitignore
Fix Hebrew and Italian translations
Updated Polish translation
Fixed typo in string
Updated Spanish translation