Unlike with X window managers, the display socket in Wayland isn't set up prior to starting the compositor. Because of this, you can't pipe the compositor's output directly into a program which needs access to $WAYLAND_DISPLAY, which is a typical setup for this purpose. Existing scripts have been forced to create a pipe/FIFO or a temporary file as an intermediary.

Instead, send the status info directly to stdin of the -s command, which does have access to $WAYLAND_DISPLAY.

Fixes #103.