Added demo link
Added demo link

makinacorpus/Leaflet.groupedlayercontrol,msiadak/Leaflet.groupedlayercontrol,ismyrnow/leaflet-groupedlayercontrol,ismyrnow/Leaflet.groupedlayercontrol,ismyrnow/leaflet-groupedlayercontrol,ismyrnow/Leaflet.groupedlayercontrol,msiadak/Leaflet.groupedlayercontrol