gtk-demo:Add a --list option
gtk-demo:Add a --list option

This just shows the available examples and then exists.

alexlarsson/gtk,jadahl/gtk,jigpu/gtk,alexlarsson/gtk,davidgumberg/gtk,jigpu/gtk,jadahl/gtk,davidgumberg/gtk,grubersjoe/adwaita,davidgumberg/gtk,jigpu/gtk,grubersjoe/adwaita,davidgumberg/gtk,jadahl/gtk,jadahl/gtk,jigpu/gtk,jadahl/gtk,jigpu/gtk,alexlarsson/gtk,jadahl/gtk,davidgumberg/gtk,jadahl/gtk,davidgumberg/gtk,grubersjoe/adwaita,grubersjoe/adwaita,jigpu/gtk,grubersjoe/adwaita,davidgumberg/gtk,alexlarsson/gtk,grubersjoe/adwaita,davidgumberg/gtk,jadahl/gtk,alexlarsson/gtk,grubersjoe/adwaita,jigpu/gtk,alexlarsson/gtk,grubersjoe/adwaita,jigpu/gtk,alexlarsson/gtk,alexlarsson/gtk