cmb_filenames

 filenames = cmb_filenames(model_name, prb, run, result_dir, network_sbml_file, flag_artificial)

 Filenames for convex estimation runs

 Input variables
   model_name      (string) model name  
   prb             (string) problem id (should not refer to alpha value or other optimisation parameters)
   run             (string) run id (like sim, but may also refer to alpha value or other optimisation parameters)
   result_dir      Name of output directory (simple string, no directory path)    

 Output variables
   filenames struct describing filenames used (constructed using [result_dir] and [run])