Updated README with new stack, lastest/master ref

README.md

@@ -22,12 +22,13 @@ If this is your first time using Docker or any of the Jupyter projects, do the f
 
 ## Available Stacks
 
-Note: Branches / tags reflect the version of the primary process in each container (e.g., notebook server). We're still thinking about how to capture versions of installed supporting libraries.
+Branches / tags reflect the version of the primary process in each container (e.g., notebook server). Currently, GitHub master / Docker latest for Jupyter Notebook containers are equivalent to 4.0.x / 4.0
 
 | Docker Hub repo | GitHub source | Git Branch → Docker Tag |
 | --------------- | ------------- | ---------------------------- |
 | [jupyter/minimal-notebook](https://hub.docker.com/r/jupyter/minimal-notebook/) | [minimal-notebook](./minimal-notebook) | master &rarr; latest <br /> 4.0.x &rarr; 4.0 <br /> 3.2.x &rarr; 3.2 |
 | [jupyter/scipy-notebook](https://hub.docker.com/r/jupyter/scipy-notebook/) | [scipy-notebook](./scipy-notebook) | master &rarr; latest <br /> 4.0.x &rarr; 4.0 <br /> 3.2.x &rarr; 3.2 |
 | [jupyter/r-notebook](https://hub.docker.com/r/jupyter/r-notebook/) | [r-notebook](./r-notebook) | master &rarr; latest <br /> 4.0.x &rarr; 4.0 <br /> 3.2.x &rarr; 3.2 |
+| [jupyter/datascience-notebook](https://hub.docker.com/r/jupyter/datascience-notebook/) | [datascience-notebook](./datascience-notebook) | master &rarr; latest <br /> 4.0.x &rarr; 4.0 |
 | [jupyter/all-spark-notebook](https://hub.docker.com/r/jupyter/all-spark-notebook/) | [all-spark-notebook](./all-spark-notebook) | master &rarr; latest <br /> 4.0.x &rarr; 4.0 <br /> 3.2.x &rarr; 3.2 |
 | [jupyter/pyspark-notebook](https://hub.docker.com/r/jupyter/pyspark-notebook/) | [pyspark-notebook](./pyspark-notebook) | master &rarr; latest <br /> 4.0.x &rarr; 4.0 <br /> 3.2.x &rarr; 3.2 |