Add badges with image size and layers

This uses the MicroBadger badge service. It allows prospective image users to
quickly get an idea of the size of an image from glancing at the README.

all-spark-notebook/README.md

-![docker pulls](https://img.shields.io/docker/pulls/jupyter/all-spark-notebook.svg) ![docker stars](https://img.shields.io/docker/stars/jupyter/all-spark-notebook.svg)
+![docker pulls](https://img.shields.io/docker/pulls/jupyter/all-spark-notebook.svg) ![docker stars](https://img.shields.io/docker/stars/jupyter/all-spark-notebook.svg) [![](https://images.microbadger.com/badges/image/jupyter/all-spark-notebook.svg)](https://microbadger.com/images/jupyter/all-spark-notebook "jupyter/all-spark-notebook image metadata")
+
 
 # Jupyter Notebook Python, Scala, R, Spark, Mesos Stack
 

base-notebook/README.md

-![docker pulls](https://img.shields.io/docker/pulls/jupyter/base-notebook.svg) ![docker stars](https://img.shields.io/docker/stars/jupyter/base-notebook.svg)
+![docker pulls](https://img.shields.io/docker/pulls/jupyter/base-notebook.svg) ![docker stars](https://img.shields.io/docker/stars/jupyter/base-notebook.svg) [![](https://images.microbadger.com/badges/image/jupyter/base-notebook.svg)](https://microbadger.com/images/jupyter/base-notebook "jupyter/base-notebook image metadata")
 
 # Base Jupyter Notebook Stack
 

datascience-notebook/README.md

-![docker pulls](https://img.shields.io/docker/pulls/jupyter/datascience-notebook.svg) ![docker stars](https://img.shields.io/docker/stars/jupyter/datascience-notebook.svg)
+![docker pulls](https://img.shields.io/docker/pulls/jupyter/datascience-notebook.svg) ![docker stars](https://img.shields.io/docker/stars/jupyter/datascience-notebook.svg) [![](https://images.microbadger.com/badges/image/jupyter/datascience-notebook.svg)](https://microbadger.com/images/jupyter/datascience-notebook "jupyter/datascience-notebook image metadata")
 
 # Jupyter Notebook Data Science Stack
 

minimal-notebook/README.md

-![docker pulls](https://img.shields.io/docker/pulls/jupyter/minimal-notebook.svg) ![docker stars](https://img.shields.io/docker/stars/jupyter/minimal-notebook.svg)
+![docker pulls](https://img.shields.io/docker/pulls/jupyter/minimal-notebook.svg) ![docker stars](https://img.shields.io/docker/stars/jupyter/minimal-notebook.svg) [![](https://images.microbadger.com/badges/image/jupyter/minimal-notebook.svg)](https://microbadger.com/images/jupyter/minimal-notebook "jupyter/minimal-notebook image metadata")
 
 # Minimal Jupyter Notebook Stack
 

pyspark-notebook/README.md

-![docker pulls](https://img.shields.io/docker/pulls/jupyter/pyspark-notebook.svg) ![docker stars](https://img.shields.io/docker/stars/jupyter/pyspark-notebook.svg)
+![docker pulls](https://img.shields.io/docker/pulls/jupyter/pyspark-notebook.svg) ![docker stars](https://img.shields.io/docker/stars/jupyter/pyspark-notebook.svg) [![](https://images.microbadger.com/badges/image/jupyter/pyspark-notebook.svg)](https://microbadger.com/images/jupyter/pyspark-notebook "jupyter/pyspark-notebook image metadata")
 
 # Jupyter Notebook Python, Spark, Mesos Stack
 

r-notebook/README.md

-![docker pulls](https://img.shields.io/docker/pulls/jupyter/r-notebook.svg) ![docker stars](https://img.shields.io/docker/stars/jupyter/r-notebook.svg)
+![docker pulls](https://img.shields.io/docker/pulls/jupyter/r-notebook.svg) ![docker stars](https://img.shields.io/docker/stars/jupyter/r-notebook.svg) [![](https://images.microbadger.com/badges/image/jupyter/r-notebook.svg)](https://microbadger.com/images/jupyter/r-notebook "jupyter/r-notebook image metadata")
 
 # Jupyter Notebook R Stack
 

scipy-notebook/README.md

-![docker pulls](https://img.shields.io/docker/pulls/jupyter/scipy-notebook.svg) ![docker stars](https://img.shields.io/docker/stars/jupyter/scipy-notebook.svg)
+![docker pulls](https://img.shields.io/docker/pulls/jupyter/scipy-notebook.svg) ![docker stars](https://img.shields.io/docker/stars/jupyter/scipy-notebook.svg) [![](https://images.microbadger.com/badges/image/jupyter/scipy-notebook.svg)](https://microbadger.com/images/jupyter/scipy-notebook "jupyter/scipy-notebook image metadata")
 
 # Jupyter Notebook Scientific Python Stack
 

tensorflow-notebook/README.md

-![docker pulls](https://img.shields.io/docker/pulls/jupyter/tensorflow-notebook.svg) ![docker stars](https://img.shields.io/docker/stars/jupyter/tensorflow-notebook.svg)
+![docker pulls](https://img.shields.io/docker/pulls/jupyter/tensorflow-notebook.svg) ![docker stars](https://img.shields.io/docker/stars/jupyter/tensorflow-notebook.svg) [![](https://images.microbadger.com/badges/image/jupyter/tensorflow-notebook.svg)](https://microbadger.com/images/jupyter/tensorflow-notebook "jupyter/tensorflow-notebook image metadata")
 
 # Jupyter Notebook Scientific Python Stack + Tensorflow