xfwm4-wayland changes

[adlo]

Hi,

Changes in my latest rewrite of xfwm4-wayland:

The Wayland compositor now uses some of xfwm4's original code.

As I have said before, the X11 and Wayland versions of the compositor
are now in the same binary and the compositor now uses the wlr-scene
API.

I have now renamed my new wayland-2 branch to wayland and renamed my
old wayland branch to wayland-old.

My latest code can now be found here:
https://github.com/adlocode/xfwm4/tree/wayland

Regards
adlo