Adding more meta
Updating the example notebook for sets and dictionaries section 1
Moving temporary Markdown template files around, updating the sets and dictionaries HTML
Working on next section of sets and dictionaries
Fleshing out diagrams
Did another section of sets and dictionaries
Sticking to HTML
Removing trial notebook files
Removing last vestiges of Markdownism
Fixing Makefile to not 'build' generated HTML files
Cleaning up another section of the sets & dictionaries chapter