Add night view via ambientlight setting on Flat and Surface maps, add

night-and-day setting to generate both night (default) and day
(prefix+'_day') versions of tiles, and add transparency to generated
PNG files

src/main/java/org/dynmap/DynmapWorld.java

@@ -4,10 +4,12 @@ import java.util.ArrayList;
 import java.util.List;
 
 import org.bukkit.World;
+import org.bukkit.Location;
 
 public class DynmapWorld {
     public World world;
     public List<MapType> maps = new ArrayList<MapType>();
     public UpdateQueue updates = new UpdateQueue();
     public ConfigurationNode configuration;
+    public List<Location> seedloc;
 }