Update README.md

add licence

Author: longcw

README.md

@@ -112,4 +112,6 @@ The forward pass requires that you supply 4 arguments to the network:
   - Use the `imcv2_recolor` function provided in `utils/im_transform.py` to preprocess your image.  Also, make sure that images have been resized to `416 x 416` pixels
 - `gt_boxes` - A list of `numpy` arrays, where each one is of size `N x 4`, where `N` is the number of features in the image.  The four values in each row should correspond to `x_bottom_left`, `y_bottom_left`, `x_top_right`, and `y_top_right`.  
 - `gt_classes` - A list of `numpy` arrays, where each array contains an integer value corresponding to the class of each bounding box provided in `gt_boxes`
-- `dontcare` - a list of lists
+- `dontcare` - a list of lists
+
+Licence: MIT