Support Wayland as a platform.

Wayland will likely replace X11 on most linux distributions in the near future.  Please consider supporting Wayland natively instead of relying on XWayland (X11 running on Wayland).

You may want to look at what the Gnome people have done so far to port their toolkit:

https://wiki.gnome.org/ThreePointNine/Features/WaylandSupport