Add Tiny Python 3.6 Notebook by Matt Harrison (#3045)

Free in the github repo, and also available as a hard copy for purchase.

free-programming-books.md

@@ -2141,6 +2141,7 @@ Kerridge (PDF) (email address *requested*, not required)
 * [The Python GTK+ 3 Tutorial](http://python-gtk-3-tutorial.readthedocs.org/en/latest/)
 * [The Standard Python Library](http://effbot.org/librarybook/) - Fredrik Lundh
 * [Think Complexity](http://greenteapress.com/complexity/) - Allen B. Downey (2nd Edition) (PDF, HTML)
+* [Tiny Python 3.6 Notebook](https://github.com/mattharrison/Tiny-Python-3.6-Notebook) - Matt Harrison (3.6)
 * [Web2py: Complete Reference Manual, 6th Edition (pre-release)](http://web2py.com/book) (2.5 - 2.x)