Art on the Quays   COLONY, an unconventional exhibition of contemporary art,  will open in Cardigan on August 11 and run every weekend until August 27.   The exhibition will take place at two different venues, at Bridge Warehouse, Cambrian quay (above the Fforest shop and café )and across the river at Pantygwyn, Teifi Warf ( the pizza teipi).  Nine Welsh artists will be making new work for the exhibition, and work include light projections, installation, photography and sculpture.