Add tracking for image in example of usage SO/DLL

AlexeyAB

2017-08-05 37259078f02b797ece6bf67aa6179cb05ba92d47

 src/yolo_console_dll.cpp

@@ -108,6 +108,7 @@
         else {   // image file
            cv::Mat mat_img = cv::imread(filename);
            std::vector<bbox_t> result_vec = detector.detect(mat_img);
            result_vec = detector.tracking(result_vec);  // comment it - if track_id is not required
            draw_boxes(mat_img, result_vec, obj_names);
            show_result(result_vec, obj_names);
         }