swcarpentry/bc — pull request #548 by gvwilson (2014-06-18 12:07:15+00:00)
Title: Using level-3 headings in Markdown files for subsections.

Fixes #546 by using level-3 headings in all Markdown source files for subsections. We continue to use level-4 headings for objectives, key points, callout boxes, and challenges.