Update README.md

Author: shulin-z

README.md

@@ -5,5 +5,6 @@
 - `ves_cls/`: Supervised deep learning tools for vesicle classification
 - `ves_embed/`: Unsupervised deep learning tools for VAE embedding
 - `ves_check/`: Web-based proofreading toolbox for vesicle segmentation/classification results
+- `ves_vis/`: Visualization for multiple use cases
 - `data/`: Data processing scripts to work with annotation tools (e.g., [VAST lite](https://lichtman.rc.fas.harvard.edu/vast/)) and visualization tools (e.g., [Neuroglancer](https://github.com/google/neuroglancer))
-- `stats/`: Statistical analysis scripts
+- `stats/`: Statistical analysis scripts