title: GWT CellTable column resizing/sorting
body: <p>Has anybody found a way to make the GWT CellTable allow user resizing of columns?  We are moving away from the old gwt-incubator widgets as they seem to have some compatibility issues with GWT 2.1+ and still need this functionality which it had previously.</p>
  
  <p>Also, if we could have simple sorting like the incubator used to provide that would be great.</p>