More parking could soon be coming to the Still River Greenway trail in Brookfield.  First Selectman Steve Dunn says the town has reached an agreement, in principal, with a developer who wants to build a supermarket.  The agreement calls for between 40 and 60 parking spaces, dedicated to municipal use.  The property goes to the river, but in a place where the greenway is already established.  The trail is being extended from the police station to the municipal center, which will open up more parking.  Dunn says right now most people don't want to park at town hall and walk across the grass.