Spell fixes for expanded functions-modules
Transfered expanded function-definition exposition
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
Added example multi-line indented block
Spelling and markup
More code markup
Renaming file to be consistent with hyphenation convention
Final two lessons on Python (still need challenges)
Removing .pyc files when cleaning
Updating based on feedback from @jdblischak
Adding challenges to the last two notebooks in the series
Updating based on feedback from @ahmadia
typographic fixes
First three lessons on SQL for beginners
More database lessons for novices.  To do:
*   `group by` in aggregation
*   data hygiene
*   explain the `%%sqlite` magic
1. Filled in 'group by'.
2. Put data hygiene in discussion of joins.
3. Got rid of 'next steps' sections.