port the clients to xdg-shell stable
A few remarks:
- I tested most of the examples against gnome-shell.
- Since I'm not familiar with autotools I only changed the Meson bits.
- I'm not familiar with weston. This was mostly a simple find and replace of
zxdg_shell_v6
toxdg_wm_base
,zxdg_toplevel_v6
toxdg_toplevel
andzxdg_surface_v6
toxdg_surface
so please review carefully.
closes #119 (closed)