* Fall back to rudimentary XMP parsing when getting image dates from EXIF fails.

image_utils.h

@@ -20,6 +20,9 @@ typedef struct {
 void
 image_free(image *pimage);
 
+int
+image_get_jpeg_date_xmp(const char * path, char ** date);
+
 int
 image_get_jpeg_resolution(const char * path, int * width, int * height);