add readthedocs url to README
@@ -7,6 +7,8 @@ It supports various state-of-the-art deep learning neural network models
(especially Graph Convolution Neural Network)
for chemical molecule property prediction.
+For more information, you can refer to [documentation](http://chainerchem.readthedocs.io/en/latest/index.html).
+
### Notes
This repository is currently under construction.
