added javadoc and changed the default heit for empty cells

simpleexample2/fxui/src/main/java/simpleex/ui/LatLongCell.java

@@ -5,7 +5,7 @@ import javafx.scene.layout.Region;
 import simpleex.core.LatLong;
 
 /**
- * 
+ * Renderer for a listview item containg a LatLong object
  * @author Adrian Stoica
  *
  */
@@ -17,14 +17,12 @@ public class LatLongCell extends ListCell<LatLong> {
 		if(empty || location == null) {
           setText(null);
           setGraphic(null);
-		  setPrefHeight(25.0);
+		  setPrefHeight(30.0);
 		} else {
 		  LatLongCellController latLongCellController = new LatLongCellController();
 		  latLongCellController.setLatLong(location);
 		  setGraphic(latLongCellController.getCellView(this.isSelected()));
 		  setPrefHeight(Region.USE_COMPUTED_SIZE);
-		  //setPrefHeight(50.0);
-		  
 		}
 	}
 }