Started adding materials for day 2.
Added lena to the repo.
First pass at a complet numpy 'full' lesson notebook.

Starting to create the presentation version.
Added a 'naked' version of the numpy notebook.
Many changes to the scipy section in prep for tomorrow.
Clear outputs in notebooks. More work in the scipy notebook.

Leaving some work for the ride on the train tomorrow morning ;-)
Merge pull request #10 from arokem/scipy

Scipy