Another stable release...
Overview of changes in lightdm 1.0.4
* Fix --enable-gtk-greeter=yes not working
* Fix X sessions with arguments in Exec not working
* Use previous session for automatic login or if greeter does not request
one.
* Correct ownership of ~/.Xauthority if upgrading from buggy version of
LightDM that had it root owned.
* Set default resolution of VNC to 1024x768, add settings for width, height,
depth into lightdm.conf.
* AppArmor profile: Fix broken gnome-keyring and dbus/gwibber, and quiesce
annoying kernel audit messages for privileges that we definitively do not
want to grant.
* Set LOGNAME environment variable