title: Drag & drop columns into or out of the SlickGrid
body: <p>I am just learning about the impressive SlickGrid library; and here's my question:</p>
  
  <p>We would like to give users the ability to drag &amp; drop columns from a list of possible columns into the grid to add columns (and possibly likewise drag &amp; drop columns out of the grid to remove columns). Think: Outlook field chooser - where you can add/remove the To column, the From column, etc. via drag &amp; drop.</p>
  
  <p>Any chance that this might be possible? Many thanks, Dave</p>