Teaching Python with ipythonblocks

This is a unit for teaching Python via [ipythonblocks](https://github.com/jiffyclub/ipythonblocks), a teaching tool that works in the IPython Notebook.

Look especially at the [README.md](https://github.com/jiffyclub/boot-camps/tree/ipythonblocks/python/ipythonblocks/README.md) and the [instructor_notes.md](https://github.com/jiffyclub/boot-camps/blob/ipythonblocks/python/ipythonblocks/instructor_notes.md)

([Link to branch](https://github.com/jiffyclub/boot-camps/tree/ipythonblocks/python/ipythonblocks).)