1,000 pounds of nails spilled out onto Lake Avenue in Danbury yesterday, prompting a road closure.  A truck spilled its load of roofing nails in the area of West Conn's west side campus entrance.  The incident happened around noon and the scene was cleared by 3pm.  West Conn directed students to use exit 2 to get to campus and noted that classes continued as scheduled.  The incident was over in time for the Grad Salute to go on as planned.