Can save an image from Mat to disk

Signed-off-by: deadprogram <ron@hybridgroup.com>

imgcodecs.cpp

@@ -5,3 +5,8 @@ Mat Image_IMRead(const char* filename, int flags) {
     cv::Mat img = cv::imread(filename, flags);
     return new cv::Mat(img);
 }
+
+bool Image_IMWrite(const char* filename, Mat img) {
+    return cv::imwrite(filename, *img);
+}
+