hakimel/reveal.js — pull request #535 by MatthewEppelsheimer (2013-07-21 16:40:52+00:00)
Title: Make header margin an overridable setting

This provides more flexibility for writing themes.

Specific changes:

1. `css/theme/template/settings.scss` adds the `$headingMargin` variable, set to `0 0 20px 0`, which is the hardcoded default before this pull request.
2. `css/theme/template/theme.scss` uses $headingMargin to set margin on headers.