[#13,transforms][l]: re-enable column transforms (bulk editing).

* TODO: only operates on documents in current view atm -- to do this properly want a transform function on Backend.

src/costco.js

@@ -25,6 +25,7 @@ var costco = function() {
         preview.push({before: JSON.stringify(before), after: JSON.stringify(after)});      
       }
     }
+    // TODO: 2012-01-05 Move this out of this function and up into (view) functions that call this
     util.render('editPreview', 'expression-preview-container', {rows: preview});
   }
 
@@ -166,4 +167,4 @@ var costco = function() {
     ensureCommit: ensureCommit,
     uploadCSV: uploadCSV 
   };
-}();
+}();