README: Update
README: Update

The wayland README had outdated build instructions for weston.  Let's just
trim it down to build instructions for wayland and a link to the web site.

abooij/wayland,bitfactor/wayland,mchalupa/wayland,eyolfson/wayland,tulcod/wayland,abooij/wayland,eyolfson/wayland,mchalupa/wayland,abooij/wayland,sir-murray/wayland,tulcod/wayland,bitfactor/wayland,bitfactor/wayland,sir-murray/wayland,sir-murray/wayland,mchalupa/wayland,tulcod/wayland,eyolfson/wayland