updated license

README.md

@@ -42,4 +42,12 @@ To understand the full installation requirement for NBExtensions explore here:
 And if you'd like the convenience of installing the plugin configurator, that can be found here:
 [https://github.com/Jupyter-contrib/jupyter_nbextensions_configurator](https://github.com/Jupyter-contrib/jupyter_nbextensions_configurator)
 
-The complete instructions and project documentation **should be consulted to install and use properly to fullest extent**.
+The complete instructions and project documentation **should be consulted to install and use properly to fullest extent**.
+
+## LICENSE
+
+CC-BY-4.0
+
+![](https://i.creativecommons.org/l/by/4.0/88x31.png)
+
+This work is licensed under a [Creative Commons Attribution 4.0 International License](https://creativecommons.org/licenses/by/4.0/).