wl_shell_surface patch sets v3

[Pekka Paalanen]

Hi Kristian,

here's the revised version, where wl_shell_surface is destroyed with the wl_surface.

The Wayland Core protocol bits:
	git://git.collabora.co.uk/git/user/pq/wayland.git shellsurf-v3
	http://cgit.collabora.com/git/user/pq/wayland.git/log/?h=shellsurf-v3

	cf89b40 server: do not send delete_id to a dead client
	42eed32 protocol: introduce wl_shell_surface
	e04c137 server: document wl_resource_post_event() arguments
	804d5dd util: clear pointers on wl_list_remove()
	ab6b073 server: no errors to a dead client

The Wayland demos bits:
	git://git.collabora.co.uk/git/user/pq/wayland-demos.git shellsurf-v3
	http://cgit.collabora.com/git/user/pq/wayland-demos.git/log/?h=shellsurf-v3

	39bb216 window: do not crash without wl_shell
	b48eba5 window: fix segfault in window_handle_key()
	bc4140a shell: check for missing wl_shell_surface
	713d0dc compositor: eliminate wlsc_surface::shell_priv
	2b9064b desktop-shell: update protocol and client to wl_shell_surface
	0abb780 shell: fix resume_desktop for zero clients
	d58060b wl_shell_surface adaptation
	819cc6f compositor: add a comment about wlsc_surface::output


- pq