First draft of the first Intermediate Python lecture

Provides an introduction to Python for scientists with some former
programming background.
Use automatically generated data for Intermediate Python lectures

Instead of making data files up by hand, use a simple model with
error to generate the data.

Includes the code to generate the data (which will be expanded on
later) to allow easily modifying the data if desirable.
Merge branch 'inter-python-intro' of git://github.com/ethanwhite/bc into ethanwhite-python
Merge branch 'inter-python-setsdicts' of git://github.com/ethanwhite/bc into ethanwhite-python
Two notebooks on sets, dictionaries, and hashing (03-dict.ipynb is still in progress)
Merge pull request #1 from gvwilson/ethanwhite-python

Pushing two notebooks (02 ready for edit, 03 in progress)