scOpen

  scOpen maps a sigTOOL compatible MATLAB Level 5 v6 MAT-file 
  These will have a .kcl extension if created by sigTOOL

  Example:
  channels=scOpen(filename)
  where filename is a fully qualified file name including path

  -------------------------------------------------------------------------
  Author: Malcolm Lidierth 11/06
  Copyright © The Author & King's College London 2006-2007
  -------------------------------------------------------------------------

  Check version - not always maintaining backwards compatability until sigTOOL
  is released
  load(filename,'sigTOOLVersion','-mat');
  if ~exist('sigTOOLVersion','var') || sigTOOLVersion<scVersion('nodisplay')
      disp('This is an old kcl file');
  end