Contains a fix for a rare bug that would cause LightDM to crash and
the Console Kit session to be removed (the session would continue to
run but behave badly). See:
https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/851345
Overview of changes in lightdm 1.0.3
* Fix reference counting issue in ConsoleKit code
* Really add the lightdm-guest-session-wrapper