added license and installation section

readme.md

@@ -1,3 +1,5 @@
+## CONTENTS
+
 This notebook and sample code were part of a tutorial given at Galvangize gSchool / fullstack Monday Dec 19, 2016.
 
 The best place to start is in the [Jupyter Notebook here](./part0_gettingstarted.ipynb).
@@ -8,4 +10,12 @@ You can also just look at the
 * [markdown of Tutorial 1](./part1_flaskwebapi.md),
 * [markdown of Tutorial 2](./part2_pythonds.md).
 
-Have fun!
+Have fun!
+
+## 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/).