The GDM code upstream talks to the account service now,
has better introspection annotations, and is more
asynchronous.
This commit updates the shell's copy to the latest
upstream.
Note, the API changed somewhat and so the callers will
need to be fixed up subsequently.
https://bugzilla.gnome.org/show_bug.cgi?id=631888
* Use --warn-all, --warn-error
* Fix various broken gtk-doc
* Drop unused shell_get_event_related
* For header defines, we currently require them to end in _H to be skipped
* Drop the no-longer-necessary fix-meta-rectangle.py hack
* Move to the convention of using -private.h for headers that are,
well, private.
* Add shell-wm-private.h
