Renaming issue

[lasley]

Renaming isn't resilient, but it also fails:

Renaming "Movie, the t04.mkv" to "Movie, the t04.mkv"
Rename fail: 
title04.mkv,itle,04
TypeError: Cannot read property '2' of null

[CoooLdk]

Can be fixed with

                            try
                                if track_num = track_regex.exec(file)[2]
                                    new_name = basename + ' t' + track_num + '.mkv'
                                    new_path = path.join(save_dir, new_name)
                                    file_path2 = path.join(save_dir, file)
                                    console.log('Renaming "' + file_path2 + '" to "' + new_path + '"')
                                    fs.rename file_path2, new_path, (err) =>
                                      return console.error(err) if err
                                      console.log 'succecss'
                            catch err
                                console.error("Rename fail: \r\n" + track_regex.exec(file) +
                                              "\r\n" + err)