Overview of changes in lightdm 1.1.3
* Actually return the system default keyboard layout, not just 'us'
* Add keyboard layout variants to list of keyboard layouts
* Check accountsservice as well as .dmrc for users' layouts
* Add lightdm_user_get_layouts() to query the configured list of layouts
on a per-user basis
* Add Lock D-Bus method that locks the seat and provides a hint to the
greeter to be in lock mode.
* Automatically lock sessions when switching away from them
* Add a has-messages property to liblightdm
* Add regression tests for PAM modules changing usernames
* Don't use g_key_file_unref, it requires glib 2.32