title: remove column from aui-datatable
body: <p>I'm trying to remove a column from an aui-datatable but I'm getting a max call stack error.</p>
  
  <p>I'm using AUI for the editable table but it throws a max callstack error exceeded when attempting to remove a column. If I switch back to YUI, by removing the editor and switching aui-datatable to datatable it works fine.</p>
  
  <p>The example I'm working with:
  <a href="http://jsfiddle.net/72Tsf/" rel="nofollow">http://jsfiddle.net/72Tsf/</a></p>
  
  <pre><code>var table, applePie, Y, pieList, pieTest;
  YUI().use('model', 'aui-datatable', 'datatable-mutable', function (Y) {
      Y.PieModel = Y.Base.create('pieModel', Y.Model, [], {}, {});
      Y.PieList = Y.Base.create('pieList', Y.ModelList, [], {
          model: Y.PieModel
      });       
      pieList = new Y.ModelList({model: Y.PieModel});
  
      table = new Y.DataTable({
          columns: [
              {key: 'type', editor: new Y.TextCellEditor()}, 
              {key: 'slices'}
          ],
          data: pieList
      });
      table.render();
  
      applePie = new Y.PieModel({type: 'apple', slices: 1});
  
      pieList.add(applePie);
      pieList.add(new Y.PieModel({type: 'apple2', slices: 2}));
  
      pieTest = new Y.Model({});
      pieTest.set('type', 'apple');
      pieList.add(pieTest);
  
      table.removeColumn(0);
  });
  </code></pre>