Laying out new material
Starting beginner's lessons on Python
Second beginner's lesson on Python
Third beginner's lesson on Python
Fourth beginner's lesson on Python
Renaming file to be consistent with hyphenation convention
Final two lessons on Python (still need challenges)
Updating based on feedback from @jdblischak
Adding challenges to the last two notebooks in the series
Updating based on feedback from @ahmadia
Moving assertions and unit testing to intermediate; not sure what to teach about defensive programming here
Re-introducing unit testing
Rewriting material on testing
Defensive programming
Modfiying links to glossary in notebook files
Replacing unit testing with debugging
Adding objectives and key points with tagged cells to the intro Python notebook
Tagging cells in a few more notebooks
Adding rules file, fixing links to rules, updating Makefile
Updating index files