title: Angularjs ui-grid sorting table according to a given column name
body: <p>I am using ui-grid version v3.0.0-rc.21-1d9f81f - 2015-05-01 and trying to sort a given grid according to a given column name. I cannot sort it externally (from javascript code), only by defining it and by clicking on the grid's headers.</p>
  
  <p>Is it possible in this version to sort the grid's data according to the grid's column name via javascript code?</p>