title: show/hide columns example for smart-table?
body: <p>ui-grid has a flag for enableGridMenu: true which provides a dropdown menu to show/hide columns.  Here is an example:
  <a href="http://ui-grid.info/docs/#/tutorial/304_grid_menu" rel="nofollow">http://ui-grid.info/docs/#/tutorial/304_grid_menu</a></p>
  
  <p>Does smart-table offer any OOTB show/hide feature or already available extension I'm missing?  I know this can be done brute force and I found this gist but it handles the show/hide at the column level and not a table wide "enableGridMenu" simplistic enablement.
  <a href="https://gist.github.com/srph/2443ece955799fee1d9f" rel="nofollow">https://gist.github.com/srph/2443ece955799fee1d9f</a></p>