Add toString() methods to help with debugging

git-svn-id: http://google-refine.googlecode.com/svn/trunk@1894 7d457c2a-affb-35e4-300a-418c747d4874

main/src/com/google/refine/model/Cell.java

@@ -179,4 +179,8 @@ public class Cell implements HasFields, Jsonizable {
             return null;
         }
     }
+    
+    public String toString() {
+        return value.toString();
+    }
 }

main/src/com/google/refine/model/Row.java

@@ -231,4 +231,13 @@ public class Row implements HasFields, Jsonizable {
         
         return (cells.size() > 0) ? new Row(cells, flagged, starred) : null;
     }
+    
+    public String toString() {
+        StringBuffer result = new StringBuffer();
+        for (Cell cell : cells) {
+            result.append(cell.toString());
+            result.append(",");
+        }
+        return result.toString();
+    }
 }