added link to VM

README.md

@@ -1,6 +1,8 @@
 
 # Data Science and Big Data with Python
 
+(C) 2016 [Steve Phelps](http://sphelps.net)
+
 This is a collection of IPython notebooks that I use to teach topics relating to Data Science and Big Data.
 
 - [Programming in Python](http://nbviewer.jupyter.org/github/phelps-sg/python-bigdata/blob/master/src/main/ipynb/intro-python.ipynb)
@@ -10,7 +12,8 @@ This is a collection of IPython notebooks that I use to teach topics relating to
 - [Map-Reduce programming and Apache Spark](http://nbviewer.jupyter.org/github/phelps-sg/python-bigdata/blob/master/src/main/ipynb/spark-mapreduce.ipynb)
 - [Column-oriented databases with HBase and HappyBase](http://nbviewer.jupyter.org/github/phelps-sg/python-bigdata/blob/master/src/main/ipynb/hbase-python-slides.ipynb)
 
-(C) 2016 [Steve Phelps](http://sphelps.net)
+A virtual-machine containing all of the prerequisite software can be downloaded [here](https://www.dropbox.com/s/nkv9s765y9peg0h/datascience-lm.ova?dl=0).
+This can be imported as a virtual appliance using [VirtualBox](https://www.virtualbox.org/).
 
 This work is licensed under the [Creative Commons Attribution 4.0 International](https://creativecommons.org/licenses/by/4.0/) license agreement.